389031864 has 64 divisors (see below), whose sum is σ = 1049694240. Its totient is φ = 119439360.

The previous prime is 389031833. The next prime is 389031887. The reversal of 389031864 is 468130983.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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, 178944 + ... + 181104.

Almost surely, 2^389031864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389031864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524847120).

389031864 is an abundant number, since it is smaller than the sum of its proper divisors (660662376).

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

389031864 is a wasteful number, since it uses less digits than its factorization.

389031864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760 (or 2756 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 389031864 is about 19723.8906912404. The cubic root of 389031864 is about 730.0092974358.

The spelling of 389031864 in words is "three hundred eighty-nine million, thirty-one thousand, eight hundred sixty-four".