389646680 has 64 divisors (see below), whose sum is σ = 963014400. Its totient is φ = 141229440.

The previous prime is 389646671. The next prime is 389646701. The reversal of 389646680 is 86646983.

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, 6335 + ... + 28625.

It is an arithmetic number, because the mean of its divisors is an integer number (15047100).

Almost surely, 2^389646680 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 389646680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481507200).

389646680 is an abundant number, since it is smaller than the sum of its proper divisors (573367720).

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

389646680 is a wasteful number, since it uses less digits than its factorization.

389646680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22344 (or 22340 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The square root of 389646680 is about 19739.4701043366. The cubic root of 389646680 is about 730.3936576985.

The spelling of 389646680 in words is "three hundred eighty-nine million, six hundred forty-six thousand, six hundred eighty".