23328720 has 60 divisors (see below), whose sum is σ = 78348036. Its totient is φ = 6220800.

The previous prime is 23328707. The next prime is 23328733. The reversal of 23328720 is 2782332.

It is an interprime number because it is at equal distance from previous prime (23328707) and next prime (23328733).

It can be written as a sum of positive squares in 2 ways, for example, as 18558864 + 4769856 = 4308^2 + 2184^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15481 + ... + 16920.

Almost surely, 2^23328720 is an apocalyptic number.

23328720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23328720 is an abundant number, since it is smaller than the sum of its proper divisors (55019316).

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

23328720 is a wasteful number, since it uses less digits than its factorization.

23328720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32420 (or 32411 counting only the distinct ones).

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

The square root of 23328720 is about 4829.9813664237. The cubic root of 23328720 is about 285.7351289556.

The spelling of 23328720 in words is "twenty-three million, three hundred twenty-eight thousand, seven hundred twenty".