390930807 has 4 divisors (see below), whose sum is σ = 521241080. Its totient is φ = 260620536.

The previous prime is 390930791. The next prime is 390930811. The reversal of 390930807 is 708039093.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 390930807 - 2⁴ = 390930791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390930877) 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, 65155132 + ... + 65155137.

It is an arithmetic number, because the mean of its divisors is an integer number (130310270).

Almost surely, 2^390930807 is an apocalyptic number.

390930807 is a deficient number, since it is larger than the sum of its proper divisors (130310273).

390930807 is a wasteful number, since it uses less digits than its factorization.

390930807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130310272.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 390930807 is about 19771.9702356644. The cubic root of 390930807 is about 731.1951442815.

It can be divided in two parts, 3909 and 30807, that added together give a triangular number (34716 = T₂₆₃).

The spelling of 390930807 in words is "three hundred ninety million, nine hundred thirty thousand, eight hundred seven".