497987640 has 96 divisors (see below), whose sum is σ = 1657983600. Its totient is φ = 129553920.

The previous prime is 497987597. The next prime is 497987683. The reversal of 497987640 is 46789794.

It is a happy number.

497987640 is a `hidden beast` number, since 497 + 98 + 7 + 64 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (497987597) and next prime (497987683).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2110 + ... + 31629.

Almost surely, 2^497987640 is an apocalyptic number.

497987640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 497987640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828991800).

497987640 is an abundant number, since it is smaller than the sum of its proper divisors (1159995960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

497987640 is a wasteful number, since it uses less digits than its factorization.

497987640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33797 (or 33790 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The square root of 497987640 is about 22315.6366702812. The cubic root of 497987640 is about 792.6342868038.

The spelling of 497987640 in words is "four hundred ninety-seven million, nine hundred eighty-seven thousand, six hundred forty".