399704034831 has 32 divisors (see below), whose sum is σ = 559557407232. Its totient is φ = 253304895360.

The previous prime is 399704034827. The next prime is 399704034869. The reversal of 399704034831 is 138430407993.

It is not a de Polignac number, because 399704034831 - 2² = 399704034827 is a prime.

It is a super-2 number, since 2×399704034831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399704034031) 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 31 ways as a sum of consecutive naturals, for example, 36796341 + ... + 36807201.

It is an arithmetic number, because the mean of its divisors is an integer number (17486168976).

Almost surely, 2^399704034831 is an apocalyptic number.

399704034831 is a deficient number, since it is larger than the sum of its proper divisors (159853372401).

399704034831 is a wasteful number, since it uses less digits than its factorization.

399704034831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14143.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 399704034831 in words is "three hundred ninety-nine billion, seven hundred four million, thirty-four thousand, eight hundred thirty-one".