31745994 has 32 divisors (see below), whose sum is σ = 73215360. Its totient is φ = 8988672.

The previous prime is 31745983. The next prime is 31746023. The reversal of 31745994 is 49954713.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1402 + ... + 8090.

It is an arithmetic number, because the mean of its divisors is an integer number (2287980).

Almost surely, 2^31745994 is an apocalyptic number.

31745994 is an abundant number, since it is smaller than the sum of its proper divisors (41469366).

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

31745994 is a wasteful number, since it uses less digits than its factorization.

31745994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814.

The product of its digits is 136080, while the sum is 42.

The square root of 31745994 is about 5634.3583485611. The cubic root of 31745994 is about 316.6379583701.

The spelling of 31745994 in words is "thirty-one million, seven hundred forty-five thousand, nine hundred ninety-four".