23725440 has 128 divisors (see below), whose sum is σ = 84088800. Its totient is φ = 6322176.

The previous prime is 23725439. The next prime is 23725441. The reversal of 23725440 is 4452732.

It is an interprime number because it is at equal distance from previous prime (23725439) and next prime (23725441).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23725441) 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, 16594 + ... + 17966.

Almost surely, 2^23725440 is an apocalyptic number.

23725440 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 23725440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42044400).

23725440 is an abundant number, since it is smaller than the sum of its proper divisors (60363360).

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

23725440 is a wasteful number, since it uses less digits than its factorization.

23725440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 23725440 is about 4870.8767177994. The cubic root of 23725440 is about 287.3457370282.

The spelling of 23725440 in words is "twenty-three million, seven hundred twenty-five thousand, four hundred forty".