389436520 has 32 divisors (see below), whose sum is σ = 955890720. Its totient is φ = 141613120.

The previous prime is 389436497. The next prime is 389436569. The reversal of 389436520 is 25634983.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442102 + ... + 442981.

It is an arithmetic number, because the mean of its divisors is an integer number (29871585).

Almost surely, 2^389436520 is an apocalyptic number.

It is an amenable number.

389436520 is an abundant number, since it is smaller than the sum of its proper divisors (566454200).

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

389436520 is a wasteful number, since it uses less digits than its factorization.

389436520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885105 (or 885101 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 389436520 is about 19734.1460418230. The cubic root of 389436520 is about 730.2623189375.

The spelling of 389436520 in words is "three hundred eighty-nine million, four hundred thirty-six thousand, five hundred twenty".