390432890879 has 4 divisors (see below), whose sum is σ = 390440812584. Its totient is φ = 390424969176.

The previous prime is 390432890779. The next prime is 390432890923. The reversal of 390432890879 is 978098234093.

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

It is a cyclic number.

It is not a de Polignac number, because 390432890879 - 2³² = 386137923583 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 (390432890279) 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, 3886457 + ... + 3985650.

It is an arithmetic number, because the mean of its divisors is an integer number (97610203146).

Almost surely, 2^390432890879 is an apocalyptic number.

390432890879 is a deficient number, since it is larger than the sum of its proper divisors (7921705).

390432890879 is an equidigital number, since it uses as much as digits as its factorization.

390432890879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7921704.

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 390432890879 in words is "three hundred ninety billion, four hundred thirty-two million, eight hundred ninety thousand, eight hundred seventy-nine".