389922720 has 96 divisors (see below), whose sum is σ = 1339934400. Its totient is φ = 94525440.

The previous prime is 389922697. The next prime is 389922737. The reversal of 389922720 is 27229983.

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

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, 31645 + ... + 42204.

It is an arithmetic number, because the mean of its divisors is an integer number (13957650).

Almost surely, 2^389922720 is an apocalyptic number.

389922720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389922720 is an abundant number, since it is smaller than the sum of its proper divisors (950011680).

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

389922720 is a wasteful number, since it uses less digits than its factorization.

389922720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73878 (or 73870 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 389922720 is about 19746.4609487371. The cubic root of 389922720 is about 730.5660962034.

The spelling of 389922720 in words is "three hundred eighty-nine million, nine hundred twenty-two thousand, seven hundred twenty".