31456768 has 80 divisors (see below), whose sum is σ = 73459584. Its totient is φ = 13178880.

The previous prime is 31456741. The next prime is 31456769. The reversal of 31456768 is 86765413.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31456768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31456769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240063 + ... + 240193.

Almost surely, 2^31456768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31456768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36729792).

31456768 is an abundant number, since it is smaller than the sum of its proper divisors (42002816).

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

31456768 is an equidigital number, since it uses as much as digits as its factorization.

31456768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 207 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 31456768 is about 5608.6333451207. The cubic root of 31456768 is about 315.6734328577.

The spelling of 31456768 in words is "thirty-one million, four hundred fifty-six thousand, seven hundred sixty-eight".