640059056 has 40 divisors (see below), whose sum is σ = 1526298144. Its totient is φ = 253209600.

The previous prime is 640059053. The next prime is 640059073. The reversal of 640059056 is 650950046.

It is a happy number.

It is a super-2 number, since 2×640059056² = 819351190335222272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (640059053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218345 + ... + 221256.

Almost surely, 2^640059056 is an apocalyptic number.

It is an amenable number.

640059056 is an abundant number, since it is smaller than the sum of its proper divisors (886239088).

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

640059056 is a wasteful number, since it uses less digits than its factorization.

640059056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439629 (or 439623 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 640059056 is about 25299.3884511069. The cubic root of 640059056 is about 861.8003819256.

It can be divided in two parts, 6400 and 59056, that added together give a palindrome (65456).

The spelling of 640059056 in words is "six hundred forty million, fifty-nine thousand, fifty-six".