642960708 has 48 divisors (see below), whose sum is σ = 1667774976. Its totient is φ = 191450880.

The previous prime is 642960683. The next prime is 642960727. The reversal of 642960708 is 807069246.

It is a super-2 number, since 2×642960708² = 826796944063722528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642960708.

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 15 ways as a sum of consecutive naturals, for example, 61641 + ... + 71312.

It is an arithmetic number, because the mean of its divisors is an integer number (34745312).

Almost surely, 2^642960708 is an apocalyptic number.

It is an amenable number.

642960708 is an abundant number, since it is smaller than the sum of its proper divisors (1024814268).

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

642960708 is a wasteful number, since it uses less digits than its factorization.

642960708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133004 (or 133002 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 642960708 is about 25356.6698917662. The cubic root of 642960708 is about 863.1007179120.

The spelling of 642960708 in words is "six hundred forty-two million, nine hundred sixty thousand, seven hundred eight".