642231108 has 72 divisors (see below), whose sum is σ = 1644843200. Its totient is φ = 211273920.

The previous prime is 642231091. The next prime is 642231133. The reversal of 642231108 is 801132246.

642231108 is a `hidden beast` number, since 642 + 2 + 3 + 1 + 10 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1124463 + ... + 1125033.

Almost surely, 2^642231108 is an apocalyptic number.

It is an amenable number.

642231108 is an abundant number, since it is smaller than the sum of its proper divisors (1002612092).

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

642231108 is a wasteful number, since it uses less digits than its factorization.

642231108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 932 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 642231108 is about 25342.2790608895. The cubic root of 642231108 is about 862.7741263504.

The spelling of 642231108 in words is "six hundred forty-two million, two hundred thirty-one thousand, one hundred eight".