388561872 has 20 divisors (see below), whose sum is σ = 1003784960. Its totient is φ = 129520608.

The previous prime is 388561867. The next prime is 388561883. The reversal of 388561872 is 278165883.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 8095039 = 388561872 / (3 + 8 + 8 + 5 + 6 + 1 + 8 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4047472 + ... + 4047567.

It is an arithmetic number, because the mean of its divisors is an integer number (50189248).

Almost surely, 2^388561872 is an apocalyptic number.

It is an amenable number.

388561872 is an abundant number, since it is smaller than the sum of its proper divisors (615223088).

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

388561872 is a wasteful number, since it uses less digits than its factorization.

388561872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8095050 (or 8095044 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 388561872 is about 19711.9728084228. The cubic root of 388561872 is about 729.7152025978.

The spelling of 388561872 in words is "three hundred eighty-eight million, five hundred sixty-one thousand, eight hundred seventy-two".