31668764 has 6 divisors (see below), whose sum is σ = 55420344. Its totient is φ = 15834380.

The previous prime is 31668761. The next prime is 31668803. The reversal of 31668764 is 46786613.

It is a super-2 number, since 2×31668764² = 2005821226575392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31668761) 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 as a sum of consecutive naturals, namely, 3958592 + ... + 3958599.

It is an arithmetic number, because the mean of its divisors is an integer number (9236724).

Almost surely, 2^31668764 is an apocalyptic number.

It is an amenable number.

31668764 is a deficient number, since it is larger than the sum of its proper divisors (23751580).

31668764 is a wasteful number, since it uses less digits than its factorization.

31668764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7917195 (or 7917193 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 31668764 is about 5627.5006885828. The cubic root of 31668764 is about 316.3809830966.

The spelling of 31668764 in words is "thirty-one million, six hundred sixty-eight thousand, seven hundred sixty-four".