389306720 has 48 divisors (see below), whose sum is σ = 1003354128. Its totient is φ = 141565440.

The previous prime is 389306653. The next prime is 389306741. The reversal of 389306720 is 27603983.

389306720 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 108839 + ... + 112358.

It is an arithmetic number, because the mean of its divisors is an integer number (20903211).

Almost surely, 2^389306720 is an apocalyptic number.

It is an amenable number.

389306720 is an abundant number, since it is smaller than the sum of its proper divisors (614047408).

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

389306720 is a wasteful number, since it uses less digits than its factorization.

389306720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221223 (or 221215 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 389306720 is about 19730.8570518363. The cubic root of 389306720 is about 730.1811772733.

The spelling of 389306720 in words is "three hundred eighty-nine million, three hundred six thousand, seven hundred twenty".