31223768 has 16 divisors (see below), whose sum is σ = 58649280. Its totient is φ = 15583968.

The previous prime is 31223761. The next prime is 31223771. The reversal of 31223768 is 86732213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1721 + ... + 8087.

It is an arithmetic number, because the mean of its divisors is an integer number (3665580).

Almost surely, 2^31223768 is an apocalyptic number.

It is an amenable number.

31223768 is a deficient number, since it is larger than the sum of its proper divisors (27425512).

31223768 is a wasteful number, since it uses less digits than its factorization.

31223768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6986 (or 6982 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 31223768 is about 5587.8231897582. The cubic root of 31223768 is about 314.8921038043.

The spelling of 31223768 in words is "thirty-one million, two hundred twenty-three thousand, seven hundred sixty-eight".