388678427631 has 48 divisors (see below), whose sum is σ = 637258658400. Its totient is φ = 226303808256.

The previous prime is 388678427617. The next prime is 388678427647. The reversal of 388678427631 is 136724876883.

388678427631 is a `hidden beast` number, since 3 + 8 + 86 + 78 + 427 + 63 + 1 = 666.

It is not a de Polignac number, because 388678427631 - 2⁷ = 388678427503 is a prime.

It is a super-2 number, since 2×388678427631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388678427611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1605285 + ... + 1831473.

It is an arithmetic number, because the mean of its divisors is an integer number (13276222050).

Almost surely, 2^388678427631 is an apocalyptic number.

388678427631 is a deficient number, since it is larger than the sum of its proper divisors (248580230769).

388678427631 is a wasteful number, since it uses less digits than its factorization.

388678427631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227000 (or 226997 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 63.

The spelling of 388678427631 in words is "three hundred eighty-eight billion, six hundred seventy-eight million, four hundred twenty-seven thousand, six hundred thirty-one".