253640624 has 40 divisors (see below), whose sum is σ = 507482400. Its totient is φ = 122715648.

The previous prime is 253640609. The next prime is 253640657. The reversal of 253640624 is 426046352.

It is a super-2 number, since 2×253640624² = 128667132286218752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116732 + ... + 118884.

It is an arithmetic number, because the mean of its divisors is an integer number (12687060).

Almost surely, 2^253640624 is an apocalyptic number.

It is an amenable number.

253640624 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

253640624 is a wasteful number, since it uses less digits than its factorization.

253640624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397 (or 2391 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 253640624 is about 15926.0988317918. The cubic root of 253640624 is about 633.0037327150.

Adding to 253640624 its reverse (426046352), we get a palindrome (679686976).

The spelling of 253640624 in words is "two hundred fifty-three million, six hundred forty thousand, six hundred twenty-four".