388108986 has 32 divisors (see below), whose sum is σ = 794631168. Its totient is φ = 126314160.

The previous prime is 388108961. The next prime is 388108999. The reversal of 388108986 is 689801883.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137061 + ... + 139863.

It is an arithmetic number, because the mean of its divisors is an integer number (24832224).

Almost surely, 2^388108986 is an apocalyptic number.

388108986 is an abundant number, since it is smaller than the sum of its proper divisors (406522182).

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

388108986 is a wasteful number, since it uses less digits than its factorization.

388108986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346.

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 388108986 is about 19700.4818722792. The cubic root of 388108986 is about 729.4315872959.

The spelling of 388108986 in words is "three hundred eighty-eight million, one hundred eight thousand, nine hundred eighty-six".