388431888 has 80 divisors (see below), whose sum is σ = 1085097216. Its totient is φ = 119024640.

The previous prime is 388431871. The next prime is 388431919. The reversal of 388431888 is 888134883.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 388431888.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167956 + ... + 170252.

Almost surely, 2^388431888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388431888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (542548608).

388431888 is an abundant number, since it is smaller than the sum of its proper divisors (696665328).

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

388431888 is a wasteful number, since it uses less digits than its factorization.

388431888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592 (or 2586 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 51.

The square root of 388431888 is about 19708.6754501666. The cubic root of 388431888 is about 729.6338239840.

The spelling of 388431888 in words is "three hundred eighty-eight million, four hundred thirty-one thousand, eight hundred eighty-eight".