640029874 has 16 divisors (see below), whose sum is σ = 1048732416. Its totient is φ = 290530800.

The previous prime is 640029851. The next prime is 640029893. The reversal of 640029874 is 478920046.

It is a super-2 number, since 2×640029874² = 819276479224911752, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2562 + ... + 35869.

It is an arithmetic number, because the mean of its divisors is an integer number (65545776).

Almost surely, 2^640029874 is an apocalyptic number.

640029874 is a deficient number, since it is larger than the sum of its proper divisors (408702542).

640029874 is a wasteful number, since it uses less digits than its factorization.

640029874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39201.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 640029874 is about 25298.8117112247. The cubic root of 640029874 is about 861.7872844670.

The spelling of 640029874 in words is "six hundred forty million, twenty-nine thousand, eight hundred seventy-four".