388156972 has 24 divisors (see below), whose sum is σ = 777724416. Its totient is φ = 166050768.

The previous prime is 388156961. The next prime is 388156997. The reversal of 388156972 is 279651883.

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, 3453 + ... + 28075.

It is an arithmetic number, because the mean of its divisors is an integer number (32405184).

Almost surely, 2^388156972 is an apocalyptic number.

It is an amenable number.

388156972 is an abundant number, since it is smaller than the sum of its proper divisors (389567444).

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

388156972 is a wasteful number, since it uses less digits than its factorization.

388156972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25197 (or 25195 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The square root of 388156972 is about 19701.6997236279. The cubic root of 388156972 is about 729.4616484926.

The spelling of 388156972 in words is "three hundred eighty-eight million, one hundred fifty-six thousand, nine hundred seventy-two".