31994046 has 48 divisors (see below), whose sum is σ = 81788928. Its totient is φ = 8845200.

The previous prime is 31994023. The next prime is 31994057. The reversal of 31994046 is 64049913.

It is a self number, because there is not a number n which added to its sum of digits gives 31994046.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 190 + ... + 8001.

It is an arithmetic number, because the mean of its divisors is an integer number (1703936).

Almost surely, 2^31994046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31994046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40894464).

31994046 is an abundant number, since it is smaller than the sum of its proper divisors (49794882).

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

31994046 is a wasteful number, since it uses less digits than its factorization.

31994046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8237 (or 8234 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 31994046 is about 5656.3279607887. The cubic root of 31994046 is about 317.4605187851.

The spelling of 31994046 in words is "thirty-one million, nine hundred ninety-four thousand, forty-six".