23320872 has 160 divisors (see below), whose sum is σ = 72527400. Its totient is φ = 6967296.

The previous prime is 23320861. The next prime is 23320933. The reversal of 23320872 is 27802332.

It can be written as a sum of positive squares in 4 ways, for example, as 22410756 + 910116 = 4734^2 + 954^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 319428 + ... + 319500.

Almost surely, 2^23320872 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 23320872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36263700).

23320872 is an abundant number, since it is smaller than the sum of its proper divisors (49206528).

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

23320872 is a wasteful number, since it uses less digits than its factorization.

23320872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 23320872 is about 4829.1688725908. The cubic root of 23320872 is about 285.7030840370.

The spelling of 23320872 in words is "twenty-three million, three hundred twenty thousand, eight hundred seventy-two".