389720392 has 16 divisors (see below), whose sum is σ = 738260460. Its totient is φ = 192850944.

The previous prime is 389720363. The next prime is 389720407. The reversal of 389720392 is 293027983.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 371178756 + 18541636 = 19266^2 + 4306^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250333 + ... + 251884.

Almost surely, 2^389720392 is an apocalyptic number.

It is an amenable number.

389720392 is a deficient number, since it is larger than the sum of its proper divisors (348540068).

389720392 is a wasteful number, since it uses less digits than its factorization.

389720392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502320 (or 502316 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 389720392 is about 19741.3371380968. The cubic root of 389720392 is about 730.4397125694.

The spelling of 389720392 in words is "three hundred eighty-nine million, seven hundred twenty thousand, three hundred ninety-two".