31757994 has 80 divisors (see below), whose sum is σ = 75132288. Its totient is φ = 10015488.

The previous prime is 31757969. The next prime is 31758007. The reversal of 31757994 is 49975713.

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 39 ways as a sum of consecutive naturals, for example, 327354 + ... + 327450.

Almost surely, 2^31757994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31757994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37566144).

31757994 is an abundant number, since it is smaller than the sum of its proper divisors (43374294).

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

31757994 is a wasteful number, since it uses less digits than its factorization.

31757994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 192 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 31757994 is about 5635.4231429414. The cubic root of 31757994 is about 316.6778497743.

It can be divided in two parts, 317 and 57994, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 31757994 in words is "thirty-one million, seven hundred fifty-seven thousand, nine hundred ninety-four".