31989762 has 32 divisors (see below), whose sum is σ = 81244800. Its totient is φ = 9139824.

The previous prime is 31989761. The next prime is 31989773. The reversal of 31989762 is 26798913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31989761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41937 + ... + 42692.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^31989762 is an apocalyptic number.

31989762 is an abundant number, since it is smaller than the sum of its proper divisors (49255038).

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

31989762 is a wasteful number, since it uses less digits than its factorization.

31989762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84647 (or 84641 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 31989762 is about 5655.9492571981. The cubic root of 31989762 is about 317.4463488406.

The spelling of 31989762 in words is "thirty-one million, nine hundred eighty-nine thousand, seven hundred sixty-two".