389891232 has 120 divisors (see below), whose sum is σ = 1152597600. Its totient is φ = 129292416.

The previous prime is 389891231. The next prime is 389891269. The reversal of 389891232 is 232198983.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (389891231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 930319 + ... + 930737.

It is an arithmetic number, because the mean of its divisors is an integer number (9604980).

Almost surely, 2^389891232 is an apocalyptic number.

389891232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389891232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576298800).

389891232 is an abundant number, since it is smaller than the sum of its proper divisors (762706368).

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

389891232 is a wasteful number, since it uses less digits than its factorization.

389891232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 783 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 389891232 is about 19745.6636252115. The cubic root of 389891232 is about 730.5464301830.

The spelling of 389891232 in words is "three hundred eighty-nine million, eight hundred ninety-one thousand, two hundred thirty-two".