23444640 has 192 divisors, whose sum is σ = 84309120. Its totient is φ = 6158592.

The previous prime is 23444633. The next prime is 23444699. The reversal of 23444640 is 4644432.

It is a super-2 number, since 2×23444640² = 1099302289459200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349887 + ... + 349953.

It is an arithmetic number, because the mean of its divisors is an integer number (439110).

Almost surely, 2^23444640 is an apocalyptic number.

23444640 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 23444640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42154560).

23444640 is an abundant number, since it is smaller than the sum of its proper divisors (60864480).

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

23444640 is an frugal number, since it uses more digits than its factorization.

23444640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 23444640 is about 4841.9665426353. The cubic root of 23444640 is about 286.2076181667.

The spelling of 23444640 in words is "twenty-three million, four hundred forty-four thousand, six hundred forty".