31297000 has 128 divisors (see below), whose sum is σ = 88957440. Its totient is φ = 10060800.

The previous prime is 31296989. The next prime is 31297027. The reversal of 31297000 is 79213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118869 + ... + 119131.

It is an arithmetic number, because the mean of its divisors is an integer number (694980).

Almost surely, 2^31297000 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 31297000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44478720).

31297000 is an abundant number, since it is smaller than the sum of its proper divisors (57660440).

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

31297000 is a wasteful number, since it uses less digits than its factorization.

31297000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 31297000 is about 5594.3721721030. The cubic root of 31297000 is about 315.1380934791.

The spelling of 31297000 in words is "thirty-one million, two hundred ninety-seven thousand".