390564009 has 24 divisors (see below), whose sum is σ = 635291904. Its totient is φ = 229068000.

The previous prime is 390563983. The next prime is 390564037. The reversal of 390564009 is 900465093.

390564009 is a `hidden beast` number, since 3 + 9 + 0 + 5 + 640 + 0 + 9 = 666.

It is not a de Polignac number, because 390564009 - 2⁵ = 390563977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390564509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60562 + ... + 66699.

It is an arithmetic number, because the mean of its divisors is an integer number (26470496).

Almost surely, 2^390564009 is an apocalyptic number.

It is an amenable number.

390564009 is a deficient number, since it is larger than the sum of its proper divisors (244727895).

390564009 is a wasteful number, since it uses less digits than its factorization.

390564009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127309 (or 127306 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 390564009 is about 19762.6923520051. The cubic root of 390564009 is about 730.9663869696.

The spelling of 390564009 in words is "three hundred ninety million, five hundred sixty-four thousand, nine".