640604130 has 32 divisors (see below), whose sum is σ = 1542941568. Its totient is φ = 170217600.

The previous prime is 640604089. The next prime is 640604143. The reversal of 640604130 is 31406046.

It is a self number, because there is not a number n which added to its sum of digits gives 640604130.

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 15 ways as a sum of consecutive naturals, for example, 29566 + ... + 46425.

It is an arithmetic number, because the mean of its divisors is an integer number (48216924).

Almost surely, 2^640604130 is an apocalyptic number.

640604130 is an abundant number, since it is smaller than the sum of its proper divisors (902337438).

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

640604130 is a wasteful number, since it uses less digits than its factorization.

640604130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76282.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 640604130 is about 25310.1586324543. The cubic root of 640604130 is about 862.0449487851.

The spelling of 640604130 in words is "six hundred forty million, six hundred four thousand, one hundred thirty".