23575640 has 48 divisors (see below), whose sum is σ = 58317840. Its totient is φ = 8571200.

The previous prime is 23575613. The next prime is 23575661. The reversal of 23575640 is 4657532.

It is a junction number, because it is equal to n+sod(n) for n = 23575597 and 23575606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2405 + ... + 7275.

It is an arithmetic number, because the mean of its divisors is an integer number (1214955).

Almost surely, 2^23575640 is an apocalyptic number.

23575640 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 23575640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29158920).

23575640 is an abundant number, since it is smaller than the sum of its proper divisors (34742200).

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

23575640 is a wasteful number, since it uses less digits than its factorization.

23575640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4904 (or 4889 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 23575640 is about 4855.4752599514. The cubic root of 23575640 is about 286.7397025612.

It can be divided in two parts, 2357 and 5640, that added together give a palindrome (7997).

The spelling of 23575640 in words is "twenty-three million, five hundred seventy-five thousand, six hundred forty".