640292592 has 20 divisors (see below), whose sum is σ = 1654089320. Its totient is φ = 213430848.

The previous prime is 640292579. The next prime is 640292623. The reversal of 640292592 is 295292046.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 640292592.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6669667 + ... + 6669762.

It is an arithmetic number, because the mean of its divisors is an integer number (82704466).

Almost surely, 2^640292592 is an apocalyptic number.

It is an amenable number.

640292592 is an abundant number, since it is smaller than the sum of its proper divisors (1013796728).

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

640292592 is a wasteful number, since it uses less digits than its factorization.

640292592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13339440 (or 13339434 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 640292592 is about 25304.0034777108. The cubic root of 640292592 is about 861.9051831619.

The spelling of 640292592 in words is "six hundred forty million, two hundred ninety-two thousand, five hundred ninety-two".