31804768 has 48 divisors (see below), whose sum is σ = 66286080. Its totient is φ = 14990976.

The previous prime is 31804753. The next prime is 31804769. The reversal of 31804768 is 86740813.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31804769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57871 + ... + 58417.

It is an arithmetic number, because the mean of its divisors is an integer number (1380960).

Almost surely, 2^31804768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31804768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33143040).

31804768 is an abundant number, since it is smaller than the sum of its proper divisors (34481312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31804768 is a wasteful number, since it uses less digits than its factorization.

31804768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 31804768 is about 5639.5716149367. The cubic root of 31804768 is about 316.8332439691.

The spelling of 31804768 in words is "thirty-one million, eight hundred four thousand, seven hundred sixty-eight".