389640312 has 48 divisors (see below), whose sum is σ = 1075197240. Its totient is φ = 127428288.

The previous prime is 389640311. The next prime is 389640319. The reversal of 389640312 is 213046983.

389640312 is a `hidden beast` number, since 3 + 8 + 9 + 640 + 3 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389640311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47238 + ... + 54869.

Almost surely, 2^389640312 is an apocalyptic number.

It is an amenable number.

389640312 is an abundant number, since it is smaller than the sum of its proper divisors (685556928).

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

389640312 is a wasteful number, since it uses less digits than its factorization.

389640312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102172 (or 102165 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 389640312 is about 19739.3088024885. The cubic root of 389640312 is about 730.3896787330.

The spelling of 389640312 in words is "three hundred eighty-nine million, six hundred forty thousand, three hundred twelve".