31990839458 has 6 divisors (see below), whose sum is σ = 47986638609. Its totient is φ = 15995293256.

The previous prime is 31990839443. The next prime is 31990839469. The reversal of 31990839458 is 85493809913.

It can be written as a sum of positive squares in 2 ways, for example, as 26441036449 + 5549803009 = 162607^2 + 74497^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=126473.

It is a super-4 number, since 4×31990839458⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31990839397 and 31990839406.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 189710 + ... + 316182.

Almost surely, 2^31990839458 is an apocalyptic number.

31990839458 is a deficient number, since it is larger than the sum of its proper divisors (15995799151).

31990839458 is an frugal number, since it uses more digits than its factorization.

31990839458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252948 (or 126475 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 59.

The spelling of 31990839458 in words is "thirty-one billion, nine hundred ninety million, eight hundred thirty-nine thousand, four hundred fifty-eight".