388943856 has 240 divisors, whose sum is σ = 1334581248. Its totient is φ = 107308800.

The previous prime is 388943801. The next prime is 388943897. The reversal of 388943856 is 658349883.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 843466 + ... + 843926.

Almost surely, 2^388943856 is an apocalyptic number.

388943856 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 388943856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667290624).

388943856 is an abundant number, since it is smaller than the sum of its proper divisors (945637392).

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

388943856 is a wasteful number, since it uses less digits than its factorization.

388943856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 504 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 388943856 is about 19721.6595650569. The cubic root of 388943856 is about 729.9542449586.

The spelling of 388943856 in words is "three hundred eighty-eight million, nine hundred forty-three thousand, eight hundred fifty-six".