23156320 has 96 divisors (see below), whose sum is σ = 60963840. Its totient is φ = 8240640.

The previous prime is 23156293. The next prime is 23156321. The reversal of 23156320 is 2365132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 23156291 and 23156300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23156321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103729 + ... + 103951.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^23156320 is an apocalyptic number.

23156320 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 23156320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30481920).

23156320 is an abundant number, since it is smaller than the sum of its proper divisors (37807520).

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

23156320 is a wasteful number, since it uses less digits than its factorization.

23156320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 23156320 is about 4812.1014120652. The cubic root of 23156320 is about 285.0295239754.

The spelling of 23156320 in words is "twenty-three million, one hundred fifty-six thousand, three hundred twenty".