31489368 has 32 divisors (see below), whose sum is σ = 80853360. Its totient is φ = 10212480.

The previous prime is 31489363. The next prime is 31489391. The reversal of 31489368 is 86398413.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31489363) 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 7 ways as a sum of consecutive naturals, for example, 16843 + ... + 18618.

Almost surely, 2^31489368 is an apocalyptic number.

It is an amenable number.

31489368 is an abundant number, since it is smaller than the sum of its proper divisors (49363992).

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

31489368 is a wasteful number, since it uses less digits than its factorization.

31489368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35507 (or 35503 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 31489368 is about 5611.5388263827. The cubic root of 31489368 is about 315.7824438552.

The spelling of 31489368 in words is "thirty-one million, four hundred eighty-nine thousand, three hundred sixty-eight".