31998968 has 8 divisors (see below), whose sum is σ = 59998080. Its totient is φ = 15999480.

The previous prime is 31998949. The next prime is 31998973. The reversal of 31998968 is 86989913.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999928 + ... + 1999943.

It is an arithmetic number, because the mean of its divisors is an integer number (7499760).

Almost surely, 2^31998968 is an apocalyptic number.

It is an amenable number.

31998968 is a deficient number, since it is larger than the sum of its proper divisors (27999112).

31998968 is a wasteful number, since it uses less digits than its factorization.

31998968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999877 (or 3999873 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 31998968 is about 5656.7630319822. The cubic root of 31998968 is about 317.4767974447.

It can be divided in two parts, 3199 and 8968, that added together give a cube (12167 = 23³).

The spelling of 31998968 in words is "thirty-one million, nine hundred ninety-eight thousand, nine hundred sixty-eight".