399246214731 has 32 divisors (see below), whose sum is σ = 655279726080. Its totient is φ = 210557193984.

The previous prime is 399246214723. The next prime is 399246214747. The reversal of 399246214731 is 137412642993.

It is not a de Polignac number, because 399246214731 - 2³ = 399246214723 is a prime.

It is a super-2 number, since 2×399246214731² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399246214781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1610535 + ... + 1841823.

It is an arithmetic number, because the mean of its divisors is an integer number (20477491440).

Almost surely, 2^399246214731 is an apocalyptic number.

399246214731 is a deficient number, since it is larger than the sum of its proper divisors (256033511349).

399246214731 is a wasteful number, since it uses less digits than its factorization.

399246214731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237635.

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

The spelling of 399246214731 in words is "three hundred ninety-nine billion, two hundred forty-six million, two hundred fourteen thousand, seven hundred thirty-one".