23857920 has 216 divisors, whose sum is σ = 87687600. Its totient is φ = 5971968.

The previous prime is 23857903. The next prime is 23857931. The reversal of 23857920 is 2975832.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218826 + ... + 218934.

Almost surely, 2^23857920 is an apocalyptic number.

23857920 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 23857920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43843800).

23857920 is an abundant number, since it is smaller than the sum of its proper divisors (63829680).

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

23857920 is a wasteful number, since it uses less digits than its factorization.

23857920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 23857920 is about 4884.4569810778. The cubic root of 23857920 is about 287.8795792854.

The spelling of 23857920 in words is "twenty-three million, eight hundred fifty-seven thousand, nine hundred twenty".