389974988 has 12 divisors (see below), whose sum is σ = 734952960. Its totient is φ = 179988432.

The previous prime is 389974973. The next prime is 389974993. The reversal of 389974988 is 889479983.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3749708 + ... + 3749811.

It is an arithmetic number, because the mean of its divisors is an integer number (61246080).

Almost surely, 2^389974988 is an apocalyptic number.

It is an amenable number.

389974988 is a deficient number, since it is larger than the sum of its proper divisors (344977972).

389974988 is a wasteful number, since it uses less digits than its factorization.

389974988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7499536 (or 7499534 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 65.

The square root of 389974988 is about 19747.7843820516. The cubic root of 389974988 is about 730.5987381610.

It can be divided in two parts, 3899 and 74988, that added together give a palindrome (78887).

The spelling of 389974988 in words is "three hundred eighty-nine million, nine hundred seventy-four thousand, nine hundred eighty-eight".