389700666 has 32 divisors (see below), whose sum is σ = 895867200. Its totient is φ = 125420400.

The previous prime is 389700653. The next prime is 389700683. The reversal of 389700666 is 666007983.

It is a Curzon number.

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, 122860 + ... + 125991.

It is an arithmetic number, because the mean of its divisors is an integer number (27995850).

Almost surely, 2^389700666 is an apocalyptic number.

389700666 is an abundant number, since it is smaller than the sum of its proper divisors (506166534).

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

389700666 is a wasteful number, since it uses less digits than its factorization.

389700666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248891 (or 248885 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 389700666 is about 19740.8375202269. The cubic root of 389700666 is about 730.4273884372.

The spelling of 389700666 in words is "three hundred eighty-nine million, seven hundred thousand, six hundred sixty-six".