389718432 has 96 divisors (see below), whose sum is σ = 1152869760. Its totient is φ = 128056320.

The previous prime is 389718409. The next prime is 389718473. The reversal of 389718432 is 234817983.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 58168 + ... + 64520.

It is an arithmetic number, because the mean of its divisors is an integer number (12009060).

Almost surely, 2^389718432 is an apocalyptic number.

389718432 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 389718432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576434880).

389718432 is an abundant number, since it is smaller than the sum of its proper divisors (763151328).

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

389718432 is a wasteful number, since it uses less digits than its factorization.

389718432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443 (or 6429 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 389718432 is about 19741.2874960069. The cubic root of 389718432 is about 730.4384880469.

The spelling of 389718432 in words is "three hundred eighty-nine million, seven hundred eighteen thousand, four hundred thirty-two".