31984242 has 16 divisors (see below), whose sum is σ = 67731552. Its totient is φ = 10034240.

The previous prime is 31984241. The next prime is 31984273. The reversal of 31984242 is 24248913.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (31984241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156684 + ... + 156887.

It is an arithmetic number, because the mean of its divisors is an integer number (4233222).

Almost surely, 2^31984242 is an apocalyptic number.

31984242 is an abundant number, since it is smaller than the sum of its proper divisors (35747310).

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

31984242 is a wasteful number, since it uses less digits than its factorization.

31984242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313593.

The product of its digits is 13824, while the sum is 33.

The square root of 31984242 is about 5655.4612543983. The cubic root of 31984242 is about 317.4280887835.

The spelling of 31984242 in words is "thirty-one million, nine hundred eighty-four thousand, two hundred forty-two".