31668368 has 20 divisors (see below), whose sum is σ = 62399280. Its totient is φ = 15565344.

The previous prime is 31668361. The next prime is 31668379. The reversal of 31668368 is 86386613.

It is not an unprimeable number, because it can be changed into a prime (31668361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15830 + ... + 17717.

It is an arithmetic number, because the mean of its divisors is an integer number (3119964).

Almost surely, 2^31668368 is an apocalyptic number.

It is an amenable number.

31668368 is a deficient number, since it is larger than the sum of its proper divisors (30730912).

31668368 is a wasteful number, since it uses less digits than its factorization.

31668368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33614 (or 33608 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 31668368 is about 5627.4655041146. The cubic root of 31668368 is about 316.3796643693.

The spelling of 31668368 in words is "thirty-one million, six hundred sixty-eight thousand, three hundred sixty-eight".