Which number will come in place of the question mark (?) in the following series?

Which number will come in place of the question mark (?) in the following series?
निम्नलिखित में से कौन सी संख्या दी गई श्रेणी में प्रश्नचिह्न (?) के स्थान पर आएगी?
239, 274, 309, 354, 399, 454, ?

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