388411988 has 48 divisors (see below), whose sum is σ = 732173904. Its totient is φ = 179650560.

The previous prime is 388411979. The next prime is 388411997. The reversal of 388411988 is 889114883.

It is an interprime number because it is at equal distance from previous prime (388411979) and next prime (388411997).

It can be written as a sum of positive squares in 8 ways, for example, as 110923024 + 277488964 = 10532^2 + 16658^2 .

It is a super-2 number, since 2×388411988² = 301727744844224288, which contains 22 as substring.

It is a congruent number.

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, 1611548 + ... + 1611788.

It is an arithmetic number, because the mean of its divisors is an integer number (15253623).

Almost surely, 2^388411988 is an apocalyptic number.

It is an amenable number.

388411988 is a deficient number, since it is larger than the sum of its proper divisors (343761916).

388411988 is a wasteful number, since it uses less digits than its factorization.

388411988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 570 counting only the distinct ones).

The product of its digits is 442368, while the sum is 50.

The square root of 388411988 is about 19708.1705898848. The cubic root of 388411988 is about 729.6213636604.

The spelling of 388411988 in words is "three hundred eighty-eight million, four hundred eleven thousand, nine hundred eighty-eight".