389331988 has 6 divisors (see below), whose sum is σ = 681330986. Its totient is φ = 194665992.

The previous prime is 389331967. The next prime is 389332033. The reversal of 389331988 is 889133983.

It can be written as a sum of positive squares in only one way, i.e., 387223684 + 2108304 = 19678^2 + 1452^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48666495 + ... + 48666502.

Almost surely, 2^389331988 is an apocalyptic number.

It is an amenable number.

389331988 is a deficient number, since it is larger than the sum of its proper divisors (291998998).

389331988 is a wasteful number, since it uses less digits than its factorization.

389331988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97333001 (or 97332999 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The square root of 389331988 is about 19731.4973582848. The cubic root of 389331988 is about 730.1969744309.

The spelling of 389331988 in words is "three hundred eighty-nine million, three hundred thirty-one thousand, nine hundred eighty-eight".