31097268 has 36 divisors (see below), whose sum is σ = 80283840. Its totient is φ = 10144656.

The previous prime is 31097249. The next prime is 31097293. The reversal of 31097268 is 86279013.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7498 + ... + 10881.

Almost surely, 2^31097268 is an apocalyptic number.

It is an amenable number.

31097268 is an abundant number, since it is smaller than the sum of its proper divisors (49186572).

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

31097268 is a wasteful number, since it uses less digits than its factorization.

31097268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18436 (or 18431 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 31097268 is about 5576.4924459735. The cubic root of 31097268 is about 314.4662768420.

The spelling of 31097268 in words is "thirty-one million, ninety-seven thousand, two hundred sixty-eight".