31089242 has 8 divisors (see below), whose sum is σ = 46665300. Its totient is φ = 15534144.

The previous prime is 31089203. The next prime is 31089251. The reversal of 31089242 is 24298013.

It can be written as a sum of positive squares in 2 ways, for example, as 23804641 + 7284601 = 4879^2 + 2699^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 767 + ... + 7922.

Almost surely, 2^31089242 is an apocalyptic number.

31089242 is a deficient number, since it is larger than the sum of its proper divisors (15576058).

31089242 is a wasteful number, since it uses less digits than its factorization.

31089242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10480.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 31089242 is about 5575.7727715537. The cubic root of 31089242 is about 314.4392206228.

The spelling of 31089242 in words is "thirty-one million, eighty-nine thousand, two hundred forty-two".