23915920 has 60 divisors (see below), whose sum is σ = 64693404. Its totient is φ = 8198400.

The previous prime is 23915897. The next prime is 23915921. The reversal of 23915920 is 2951932.

It can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 12054784 = 3444^2 + 3472^2 .

It is not an unprimeable number, because it can be changed into a prime (23915921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 870 + ... + 6970.

Almost surely, 2^23915920 is an apocalyptic number.

23915920 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 23915920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32346702).

23915920 is an abundant number, since it is smaller than the sum of its proper divisors (40777484).

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

23915920 is a wasteful number, since it uses less digits than its factorization.

23915920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6128 (or 6115 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 23915920 is about 4890.3905774488. The cubic root of 23915920 is about 288.1126745339.

The spelling of 23915920 in words is "twenty-three million, nine hundred fifteen thousand, nine hundred twenty".