388717056 has 400 divisors, whose sum is σ = 1441824384. Its totient is φ = 101523456.

The previous prime is 388717039. The next prime is 388717103. The reversal of 388717056 is 650717883.

It is a super-2 number, since 2×388717056² = 302201899250614272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3773901 + ... + 3774003.

Almost surely, 2^388717056 is an apocalyptic number.

388717056 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388717056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720912192).

388717056 is an abundant number, since it is smaller than the sum of its proper divisors (1053107328).

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

388717056 is a wasteful number, since it uses less digits than its factorization.

388717056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 388717056 is about 19715.9087033796. The cubic root of 388717056 is about 729.8123343206.

The spelling of 388717056 in words is "three hundred eighty-eight million, seven hundred seventeen thousand, fifty-six".