23457920 has 32 divisors (see below), whose sum is σ = 56080620. Its totient is φ = 9382912.

The previous prime is 23457911. The next prime is 23457937. The reversal of 23457920 is 2975432.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23116864 + 341056 = 4808^2 + 584^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17687 + ... + 18966.

Almost surely, 2^23457920 is an apocalyptic number.

23457920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23457920 is an abundant number, since it is smaller than the sum of its proper divisors (32622700).

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

23457920 is an equidigital number, since it uses as much as digits as its factorization.

23457920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36672 (or 36660 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 23457920 is about 4843.3376921293. The cubic root of 23457920 is about 286.2616478546.

The spelling of 23457920 in words is "twenty-three million, four hundred fifty-seven thousand, nine hundred twenty".