31789966 has 32 divisors (see below), whose sum is σ = 55194048. Its totient is φ = 13601280.

The previous prime is 31789957. The next prime is 31789969. The reversal of 31789966 is 66998713.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31789969) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 30876 + ... + 31888.

It is an arithmetic number, because the mean of its divisors is an integer number (1724814).

Almost surely, 2^31789966 is an apocalyptic number.

31789966 is a deficient number, since it is larger than the sum of its proper divisors (23404082).

31789966 is a wasteful number, since it uses less digits than its factorization.

31789966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its digits is 489888, while the sum is 49.

The square root of 31789966 is about 5638.2591284899. The cubic root of 31789966 is about 316.7840847423.

The spelling of 31789966 in words is "thirty-one million, seven hundred eighty-nine thousand, nine hundred sixty-six".