39402252864 has 84 divisors (see below), whose sum is σ = 121627116156. Its totient is φ = 12123767808.

The previous prime is 39402252833. The next prime is 39402252871. The reversal of 39402252864 is 46825220493.

39402252864 is a `hidden beast` number, since 3 + 9 + 40 + 22 + 528 + 64 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24373454400 + 15028798464 = 156120^2 + 122592^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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, 2623539 + ... + 2638514.

It is an arithmetic number, because the mean of its divisors is an integer number (1447941859).

Almost surely, 2^39402252864 is an apocalyptic number.

It is an amenable number.

39402252864 is an abundant number, since it is smaller than the sum of its proper divisors (82224863292).

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

39402252864 is a wasteful number, since it uses less digits than its factorization.

39402252864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262084 (or 5262071 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 39402252864 in words is "thirty-nine billion, four hundred two million, two hundred fifty-two thousand, eight hundred sixty-four".