388221978364 has 48 divisors (see below), whose sum is σ = 762612078816. Its totient is φ = 171420704000.

The previous prime is 388221978323. The next prime is 388221978401. The reversal of 388221978364 is 463879122883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588607 + ... + 1059670.

It is an arithmetic number, because the mean of its divisors is an integer number (15887751642).

Almost surely, 2^388221978364 is an apocalyptic number.

It is an amenable number.

388221978364 is a deficient number, since it is larger than the sum of its proper divisors (374390100452).

388221978364 is a wasteful number, since it uses less digits than its factorization.

388221978364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648446 (or 1648444 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 61.

The spelling of 388221978364 in words is "three hundred eighty-eight billion, two hundred twenty-one million, nine hundred seventy-eight thousand, three hundred sixty-four".