31823668 has 6 divisors (see below), whose sum is σ = 55691426. Its totient is φ = 15911832.

The previous prime is 31823657. The next prime is 31823669. The reversal of 31823668 is 86632813.

It can be written as a sum of positive squares in only one way, i.e., 28858384 + 2965284 = 5372^2 + 1722^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31823669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3977955 + ... + 3977962.

Almost surely, 2^31823668 is an apocalyptic number.

It is an amenable number.

31823668 is a deficient number, since it is larger than the sum of its proper divisors (23867758).

31823668 is a wasteful number, since it uses less digits than its factorization.

31823668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955921 (or 7955919 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 31823668 is about 5641.2470252596. The cubic root of 31823668 is about 316.8959909818.

The spelling of 31823668 in words is "thirty-one million, eight hundred twenty-three thousand, six hundred sixty-eight".