389755730 has 32 divisors (see below), whose sum is σ = 863460864. Its totient is φ = 123350976.

The previous prime is 389755727. The next prime is 389755733. The reversal of 389755730 is 37557983.

It is an interprime number because it is at equal distance from previous prime (389755727) and next prime (389755733).

It is not an unprimeable number, because it can be changed into a prime (389755733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213242 + ... + 215061.

It is an arithmetic number, because the mean of its divisors is an integer number (26983152).

Almost surely, 2^389755730 is an apocalyptic number.

389755730 is an abundant number, since it is smaller than the sum of its proper divisors (473705134).

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

389755730 is a wasteful number, since it uses less digits than its factorization.

389755730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428330.

The product of its (nonzero) digits is 793800, while the sum is 47.

The square root of 389755730 is about 19742.2321433013. The cubic root of 389755730 is about 730.4617895071.

The spelling of 389755730 in words is "three hundred eighty-nine million, seven hundred fifty-five thousand, seven hundred thirty".