31074642 has 24 divisors (see below), whose sum is σ = 68600844. Its totient is φ = 10162464.

The previous prime is 31074607. The next prime is 31074649. The reversal of 31074642 is 24647013.

31074642 is a `hidden beast` number, since 3 + 10 + 7 + 4 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29387241 + 1687401 = 5421^2 + 1299^2 .

It is not an unprimeable number, because it can be changed into a prime (31074649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15333 + ... + 17240.

Almost surely, 2^31074642 is an apocalyptic number.

31074642 is an abundant number, since it is smaller than the sum of its proper divisors (37526202).

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

31074642 is a wasteful number, since it uses less digits than its factorization.

31074642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32634 (or 32631 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 31074642 is about 5574.4633822459. The cubic root of 31074642 is about 314.3899910377.

The spelling of 31074642 in words is "thirty-one million, seventy-four thousand, six hundred forty-two".