642930980 has 12 divisors (see below), whose sum is σ = 1350155100. Its totient is φ = 257172384.

The previous prime is 642930943. The next prime is 642930997. The reversal of 642930980 is 89039246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 420742144 + 222188836 = 20512^2 + 14906^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16073255 + ... + 16073294.

It is an arithmetic number, because the mean of its divisors is an integer number (112512925).

Almost surely, 2^642930980 is an apocalyptic number.

It is an amenable number.

642930980 is an abundant number, since it is smaller than the sum of its proper divisors (707224120).

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

642930980 is a wasteful number, since it uses less digits than its factorization.

642930980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32146558 (or 32146556 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 642930980 is about 25356.0836881408. The cubic root of 642930980 is about 863.0874155680.

The spelling of 642930980 in words is "six hundred forty-two million, nine hundred thirty thousand, nine hundred eighty".