389689920 has 448 divisors, whose sum is σ = 1501079040. Its totient is φ = 94887936.

The previous prime is 389689919. The next prime is 389690027. The reversal of 389689920 is 29986983.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7352614 + ... + 7352666.

Almost surely, 2^389689920 is an apocalyptic number.

389689920 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 389689920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (750539520).

389689920 is an abundant number, since it is smaller than the sum of its proper divisors (1111389120).

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

389689920 is a wasteful number, since it uses less digits than its factorization.

389689920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 389689920 is about 19740.5653414486. The cubic root of 389689920 is about 730.4206745279.

The spelling of 389689920 in words is "three hundred eighty-nine million, six hundred eighty-nine thousand, nine hundred twenty".