23166720 has 108 divisors (see below), whose sum is σ = 80194296. Its totient is φ = 6174720.

The previous prime is 23166709. The next prime is 23166721. The reversal of 23166720 is 2766132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23166721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10515 + ... + 12525.

Almost surely, 2^23166720 is an apocalyptic number.

23166720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23166720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40097148).

23166720 is an abundant number, since it is smaller than the sum of its proper divisors (57027576).

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

23166720 is a wasteful number, since it uses less digits than its factorization.

23166720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 23166720 is about 4813.1818997416. The cubic root of 23166720 is about 285.0721885465.

The spelling of 23166720 in words is "twenty-three million, one hundred sixty-six thousand, seven hundred twenty".