640112330 has 64 divisors (see below), whose sum is σ = 1357969536. Its totient is φ = 214176000.

The previous prime is 640112327. The next prime is 640112371. The reversal of 640112330 is 33211046.

640112330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658745 + ... + 659715.

It is an arithmetic number, because the mean of its divisors is an integer number (21218274).

Almost surely, 2^640112330 is an apocalyptic number.

640112330 is an abundant number, since it is smaller than the sum of its proper divisors (717857206).

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

640112330 is a wasteful number, since it uses less digits than its factorization.

640112330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 640112330 is about 25300.4413004991. The cubic root of 640112330 is about 861.8242913235.

Adding to 640112330 its reverse (33211046), we get a palindrome (673323376).

The spelling of 640112330 in words is "six hundred forty million, one hundred twelve thousand, three hundred thirty".