399349431590 has 8 divisors (see below), whose sum is σ = 718828976880. Its totient is φ = 159739772632.

The previous prime is 399349431571. The next prime is 399349431601. The reversal of 399349431590 is 95134943993.

It is a happy number.

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

It is a super-2 number, since 2×399349431590² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19967471570 + ... + 19967471589.

It is an arithmetic number, because the mean of its divisors is an integer number (89853622110).

Almost surely, 2^399349431590 is an apocalyptic number.

399349431590 is a deficient number, since it is larger than the sum of its proper divisors (319479545290).

399349431590 is a wasteful number, since it uses less digits than its factorization.

399349431590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39934943166.

The product of its (nonzero) digits is 14171760, while the sum is 59.

The spelling of 399349431590 in words is "three hundred ninety-nine billion, three hundred forty-nine million, four hundred thirty-one thousand, five hundred ninety".