23444240 has 40 divisors (see below), whose sum is σ = 55442880. Its totient is φ = 9216896.

The previous prime is 23444237. The next prime is 23444243. The reversal of 23444240 is 4244432.

It is an interprime number because it is at equal distance from previous prime (23444237) and next prime (23444243).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (23444243) 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, 2237 + ... + 7203.

It is an arithmetic number, because the mean of its divisors is an integer number (1386072).

Almost surely, 2^23444240 is an apocalyptic number.

23444240 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 23444240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27721440).

23444240 is an abundant number, since it is smaller than the sum of its proper divisors (31998640).

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

23444240 is a wasteful number, since it uses less digits than its factorization.

23444240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039 (or 5033 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 23444240 is about 4841.9252369280. The cubic root of 23444240 is about 286.2059904500.

Adding to 23444240 its reverse (4244432), we get a palindrome (27688672).

The spelling of 23444240 in words is "twenty-three million, four hundred forty-four thousand, two hundred forty".