642308976 has 30 divisors (see below), whose sum is σ = 1797573440. Its totient is φ = 214102944.

The previous prime is 642308959. The next prime is 642308999. The reversal of 642308976 is 679803246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2230096 + ... + 2230383.

Almost surely, 2^642308976 is an apocalyptic number.

It is an amenable number.

642308976 is an abundant number, since it is smaller than the sum of its proper divisors (1155264464).

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

642308976 is a wasteful number, since it uses less digits than its factorization.

642308976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460493 (or 4460484 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 642308976 is about 25343.8153402364. The cubic root of 642308976 is about 862.8089942662.

The spelling of 642308976 in words is "six hundred forty-two million, three hundred eight thousand, nine hundred seventy-six".