31532868 has 24 divisors (see below), whose sum is σ = 81752160. Its totient is φ = 10510920.

The previous prime is 31532867. The next prime is 31532873. The reversal of 31532868 is 86823513.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31532863) 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 7 ways as a sum of consecutive naturals, for example, 145878 + ... + 146093.

It is an arithmetic number, because the mean of its divisors is an integer number (3406340).

Almost surely, 2^31532868 is an apocalyptic number.

It is an amenable number.

31532868 is an abundant number, since it is smaller than the sum of its proper divisors (50219292).

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

31532868 is a wasteful number, since it uses less digits than its factorization.

31532868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291984 (or 291976 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 31532868 is about 5615.4134309060. The cubic root of 31532868 is about 315.9277862012.

It can be divided in two parts, 31532 and 868, that added together give a square (32400 = 180²).

The spelling of 31532868 in words is "thirty-one million, five hundred thirty-two thousand, eight hundred sixty-eight".