390806907 has 8 divisors (see below), whose sum is σ = 525946176. Its totient is φ = 258102792.

The previous prime is 390806893. The next prime is 390806947. The reversal of 390806907 is 709608093.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390806907 - 2⁴ = 390806891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390806947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608413 + ... + 609054.

It is an arithmetic number, because the mean of its divisors is an integer number (65743272).

Almost surely, 2^390806907 is an apocalyptic number.

390806907 is a deficient number, since it is larger than the sum of its proper divisors (135139269).

390806907 is a wasteful number, since it uses less digits than its factorization.

390806907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217577.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 390806907 is about 19768.8367639576. The cubic root of 390806907 is about 731.1178887934.

The spelling of 390806907 in words is "three hundred ninety million, eight hundred six thousand, nine hundred seven".