390639707 has 8 divisors (see below), whose sum is σ = 395790000. Its totient is φ = 385523424.

The previous prime is 390639679. The next prime is 390639713. The reversal of 390639707 is 707936093.

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

It is a cyclic number.

It is not a de Polignac number, because 390639707 - 2⁶ = 390639643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390639727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15044 + ... + 31742.

It is an arithmetic number, because the mean of its divisors is an integer number (49473750).

Almost surely, 2^390639707 is an apocalyptic number.

390639707 is a deficient number, since it is larger than the sum of its proper divisors (5150293).

390639707 is a wasteful number, since it uses less digits than its factorization.

390639707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17005.

The product of its (nonzero) digits is 214326, while the sum is 44.

The square root of 390639707 is about 19764.6074334908. The cubic root of 390639707 is about 731.0136085242.

The spelling of 390639707 in words is "three hundred ninety million, six hundred thirty-nine thousand, seven hundred seven".