38979728406 has 24 divisors (see below), whose sum is σ = 85473624600. Its totient is φ = 12836697216.

The previous prime is 38979728399. The next prime is 38979728467. The reversal of 38979728406 is 60482797983.

38979728406 is a `hidden beast` number, since 38 + 97 + 97 + 28 + 406 = 666.

38979728406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 13043931 + ... + 13046918.

It is an arithmetic number, because the mean of its divisors is an integer number (3561401025).

Almost surely, 2^38979728406 is an apocalyptic number.

38979728406 is an abundant number, since it is smaller than the sum of its proper divisors (46493896194).

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

38979728406 is a wasteful number, since it uses less digits than its factorization.

38979728406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26090940 (or 26090937 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 38979728406 in words is "thirty-eight billion, nine hundred seventy-nine million, seven hundred twenty-eight thousand, four hundred six".