31297084 has 72 divisors (see below), whose sum is σ = 69981408. Its totient is φ = 12136320.

The previous prime is 31297037. The next prime is 31297099. The reversal of 31297084 is 48079213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180822 + ... + 180994.

It is an arithmetic number, because the mean of its divisors is an integer number (971964).

Almost surely, 2^31297084 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 31297084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34990704).

31297084 is an abundant number, since it is smaller than the sum of its proper divisors (38684324).

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

31297084 is a wasteful number, since it uses less digits than its factorization.

31297084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 31297084 is about 5594.3796796428. The cubic root of 31297084 is about 315.1383754186.

The spelling of 31297084 in words is "thirty-one million, two hundred ninety-seven thousand, eighty-four".