31043868 has 12 divisors (see below), whose sum is σ = 72435720. Its totient is φ = 10347952.

The previous prime is 31043861. The next prime is 31043869. The reversal of 31043868 is 86834013.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31043861) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1293483 + ... + 1293506.

It is an arithmetic number, because the mean of its divisors is an integer number (6036310).

Almost surely, 2^31043868 is an apocalyptic number.

It is an amenable number.

31043868 is an abundant number, since it is smaller than the sum of its proper divisors (41391852).

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

31043868 is a wasteful number, since it uses less digits than its factorization.

31043868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586996 (or 2586994 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 31043868 is about 5571.7024328297. The cubic root of 31043868 is about 314.2861739859.

The spelling of 31043868 in words is "thirty-one million, forty-three thousand, eight hundred sixty-eight".