31393974 has 8 divisors (see below), whose sum is σ = 62787960. Its totient is φ = 10464656.

The previous prime is 31393937. The next prime is 31393981. The reversal of 31393974 is 47939313.

It is a sphenic number, since it is the product of 3 distinct primes.

31393974 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2616159 + ... + 2616170.

It is an arithmetic number, because the mean of its divisors is an integer number (7848495).

Almost surely, 2^31393974 is an apocalyptic number.

31393974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31393974 is a wasteful number, since it uses less digits than its factorization.

31393974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5232334.

The product of its digits is 61236, while the sum is 39.

The square root of 31393974 is about 5603.0325717418. The cubic root of 31393974 is about 315.4632438346.

The spelling of 31393974 in words is "thirty-one million, three hundred ninety-three thousand, nine hundred seventy-four".