31998944 has 24 divisors (see below), whose sum is σ = 65032128. Its totient is φ = 15482880.

The previous prime is 31998943. The next prime is 31998949. The reversal of 31998944 is 44989913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31998943) 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, 15137 + ... + 17120.

It is an arithmetic number, because the mean of its divisors is an integer number (2709672).

Almost surely, 2^31998944 is an apocalyptic number.

It is an amenable number.

31998944 is an abundant number, since it is smaller than the sum of its proper divisors (33033184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31998944 is a wasteful number, since it uses less digits than its factorization.

31998944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32298 (or 32290 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 31998944 is about 5656.7609106272. The cubic root of 31998944 is about 317.4767180729.

The spelling of 31998944 in words is "thirty-one million, nine hundred ninety-eight thousand, nine hundred forty-four".