23158720 has 112 divisors (see below), whose sum is σ = 62727840. Its totient is φ = 8073216.

The previous prime is 23158703. The next prime is 23158741. The reversal of 23158720 is 2785132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78894 + ... + 79186.

It is an arithmetic number, because the mean of its divisors is an integer number (560070).

Almost surely, 2^23158720 is an apocalyptic number.

23158720 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 23158720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31363920).

23158720 is an abundant number, since it is smaller than the sum of its proper divisors (39569120).

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

23158720 is a wasteful number, since it uses less digits than its factorization.

23158720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 23158720 is about 4812.3507769073. The cubic root of 23158720 is about 285.0393707793.

The spelling of 23158720 in words is "twenty-three million, one hundred fifty-eight thousand, seven hundred twenty".