31975460 has 72 divisors (see below), whose sum is σ = 75232248. Its totient is φ = 11404800.

The previous prime is 31975457. The next prime is 31975481. The reversal of 31975460 is 6457913.

It can be written as a sum of positive squares in 4 ways, for example, as 7744 + 31967716 = 88^2 + 5654^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31975460.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 176570 + ... + 176750.

Almost surely, 2^31975460 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 31975460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37616124).

31975460 is an abundant number, since it is smaller than the sum of its proper divisors (43256788).

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

31975460 is a wasteful number, since it uses less digits than its factorization.

31975460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 31975460 is about 5654.6847834340. The cubic root of 31975460 is about 317.3990337605.

The spelling of 31975460 in words is "thirty-one million, nine hundred seventy-five thousand, four hundred sixty".