642960576 has 84 divisors (see below), whose sum is σ = 1857216504. Its totient is φ = 212659200.

The previous prime is 642960559. The next prime is 642960613. The reversal of 642960576 is 675069246.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71196 + ... + 79716.

Almost surely, 2^642960576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642960576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928608252).

642960576 is an abundant number, since it is smaller than the sum of its proper divisors (1214255928).

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

642960576 is a wasteful number, since it uses less digits than its factorization.

642960576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8670 (or 8657 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 642960576 is about 25356.6672889006. The cubic root of 642960576 is about 863.1006588471.

The spelling of 642960576 in words is "six hundred forty-two million, nine hundred sixty thousand, five hundred seventy-six".