31998412 has 12 divisors (see below), whose sum is σ = 56439040. Its totient is φ = 15872976.

The previous prime is 31998401. The next prime is 31998419. The reversal of 31998412 is 21489913.

It is not an unprimeable number, because it can be changed into a prime (31998419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30987 + ... + 32002.

Almost surely, 2^31998412 is an apocalyptic number.

It is an amenable number.

31998412 is a deficient number, since it is larger than the sum of its proper divisors (24440628).

31998412 is a wasteful number, since it uses less digits than its factorization.

31998412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63120 (or 63118 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 31998412 is about 5656.7138870549. The cubic root of 31998412 is about 317.4749586550.

It can be divided in two parts, 3199 and 8412, that added together give a palindrome (11611).

The spelling of 31998412 in words is "thirty-one million, nine hundred ninety-eight thousand, four hundred twelve".