392981872638 has 16 divisors (see below), whose sum is σ = 785989169280. Its totient is φ = 130989720216.

The previous prime is 392981872601. The next prime is 392981872667. The reversal of 392981872638 is 836278189293.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855370 + ... + 1231917.

It is an arithmetic number, because the mean of its divisors is an integer number (49124323080).

Almost surely, 2^392981872638 is an apocalyptic number.

392981872638 is an abundant number, since it is smaller than the sum of its proper divisors (393007296642).

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

392981872638 is a wasteful number, since it uses less digits than its factorization.

392981872638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118671.

The product of its digits is 62705664, while the sum is 66.

The spelling of 392981872638 in words is "three hundred ninety-two billion, nine hundred eighty-one million, eight hundred seventy-two thousand, six hundred thirty-eight".