389137920 has 160 divisors (see below), whose sum is σ = 1298702592. Its totient is φ = 99213312.

The previous prime is 389137891. The next prime is 389137927. The reversal of 389137920 is 29731983.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389137927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175539 + ... + 177741.

Almost surely, 2^389137920 is an apocalyptic number.

389137920 is a gapful number since it is divisible by the number (30) 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 389137920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649351296).

389137920 is an abundant number, since it is smaller than the sum of its proper divisors (909564672).

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

389137920 is a wasteful number, since it uses less digits than its factorization.

389137920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 389137920 is about 19726.5790242505. The cubic root of 389137920 is about 730.0756286192.

The spelling of 389137920 in words is "three hundred eighty-nine million, one hundred thirty-seven thousand, nine hundred twenty".