388720038722 has 16 divisors (see below), whose sum is σ = 585674911800. Its totient is φ = 193495209600.

The previous prime is 388720038719. The next prime is 388720038737. The reversal of 388720038722 is 227830027883.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 326679690481 + 62040348241 = 571559^2 + 249079^2 .

It is a super-2 number, since 2×388720038722² (a number of 24 digits) contains 22 as substring.

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, 7026104 + ... + 7081212.

Almost surely, 2^388720038722 is an apocalyptic number.

388720038722 is a deficient number, since it is larger than the sum of its proper divisors (196954873078).

388720038722 is a wasteful number, since it uses less digits than its factorization.

388720038722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70741.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 388720038722 in words is "three hundred eighty-eight billion, seven hundred twenty million, thirty-eight thousand, seven hundred twenty-two".