31381794 has 12 divisors (see below), whose sum is σ = 67993926. Its totient is φ = 10460592.

The previous prime is 31381789. The next prime is 31381807. The reversal of 31381794 is 49718313.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22896225 + 8485569 = 4785^2 + 2913^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 871699 + ... + 871734.

Almost surely, 2^31381794 is an apocalyptic number.

31381794 is an abundant number, since it is smaller than the sum of its proper divisors (36612132).

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

31381794 is a wasteful number, since it uses less digits than its factorization.

31381794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743441 (or 1743438 counting only the distinct ones).

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

The square root of 31381794 is about 5601.9455548943. The cubic root of 31381794 is about 315.4224415315.

The spelling of 31381794 in words is "thirty-one million, three hundred eighty-one thousand, seven hundred ninety-four".