23312730 has 48 divisors (see below), whose sum is σ = 65089440. Its totient is φ = 5328288.

The previous prime is 23312693. The next prime is 23312743. The reversal of 23312730 is 3721332.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23312697 and 23312706.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6460 + ... + 9399.

It is an arithmetic number, because the mean of its divisors is an integer number (1356030).

Almost surely, 2^23312730 is an apocalyptic number.

23312730 is an abundant number, since it is smaller than the sum of its proper divisors (41776710).

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

23312730 is a wasteful number, since it uses less digits than its factorization.

23312730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15883 (or 15876 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 23312730 is about 4828.3257967954. The cubic root of 23312730 is about 285.6698310598.

It can be divided in two parts, 23312 and 730, that added together give a palindrome (24042).

The spelling of 23312730 in words is "twenty-three million, three hundred twelve thousand, seven hundred thirty".