23244640 has 48 divisors (see below), whose sum is σ = 55384560. Its totient is φ = 9218560.

The previous prime is 23244589. The next prime is 23244647. The reversal of 23244640 is 4644232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23244647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20406 + ... + 21514.

It is an arithmetic number, because the mean of its divisors is an integer number (1153845).

Almost surely, 2^23244640 is an apocalyptic number.

23244640 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 23244640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27692280).

23244640 is an abundant number, since it is smaller than the sum of its proper divisors (32139920).

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

23244640 is a wasteful number, since it uses less digits than its factorization.

23244640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 23244640 is about 4821.2695423509. The cubic root of 23244640 is about 285.3914391422.

Adding to 23244640 its reverse (4644232), we get a palindrome (27888872).

The spelling of 23244640 in words is "twenty-three million, two hundred forty-four thousand, six hundred forty".