640080888 has 16 divisors (see below), whose sum is σ = 1600202280. Its totient is φ = 213360288.

The previous prime is 640080781. The next prime is 640080899. The reversal of 640080888 is 888080046.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 13334995 + ... + 13335042.

Almost surely, 2^640080888 is an apocalyptic number.

It is an amenable number.

640080888 is an abundant number, since it is smaller than the sum of its proper divisors (960121392).

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

640080888 is a wasteful number, since it uses less digits than its factorization.

640080888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26670046 (or 26670042 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 42.

The square root of 640080888 is about 25299.8199203077. The cubic root of 640080888 is about 861.8101802986.

The spelling of 640080888 in words is "six hundred forty million, eighty thousand, eight hundred eighty-eight".