389165720 has 16 divisors (see below), whose sum is σ = 875622960. Its totient is φ = 155666272.

The previous prime is 389165671. The next prime is 389165753. The reversal of 389165720 is 27561983.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4864532 + ... + 4864611.

It is an arithmetic number, because the mean of its divisors is an integer number (54726435).

Almost surely, 2^389165720 is an apocalyptic number.

It is an amenable number.

389165720 is an abundant number, since it is smaller than the sum of its proper divisors (486457240).

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

389165720 is a wasteful number, since it uses less digits than its factorization.

389165720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9729154 (or 9729150 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 389165720 is about 19727.2836447393. The cubic root of 389165720 is about 730.0930137313.

The spelling of 389165720 in words is "three hundred eighty-nine million, one hundred sixty-five thousand, seven hundred twenty".