390644012 has 12 divisors (see below), whose sum is σ = 745775016. Its totient is φ = 177565440.

The previous prime is 390644011. The next prime is 390644021. The reversal of 390644012 is 210446093.

It is a super-2 number, since 2×390644012² = 305205488222912288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (390644011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4439093 + ... + 4439180.

It is an arithmetic number, because the mean of its divisors is an integer number (62147918).

Almost surely, 2^390644012 is an apocalyptic number.

It is an amenable number.

390644012 is a deficient number, since it is larger than the sum of its proper divisors (355131004).

390644012 is a wasteful number, since it uses less digits than its factorization.

390644012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8878288 (or 8878286 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 390644012 is about 19764.7163399832. The cubic root of 390644012 is about 731.0162938649.

The spelling of 390644012 in words is "three hundred ninety million, six hundred forty-four thousand, twelve".