23720544 has 72 divisors (see below), whose sum is σ = 70407792. Its totient is φ = 7560960.

The previous prime is 23720533. The next prime is 23720561. The reversal of 23720544 is 44502732.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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, 4834 + ... + 8414.

It is an arithmetic number, because the mean of its divisors is an integer number (977886).

Almost surely, 2^23720544 is an apocalyptic number.

23720544 is a gapful number since it is divisible by the number (24) 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 23720544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35203896).

23720544 is an abundant number, since it is smaller than the sum of its proper divisors (46687248).

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

23720544 is a wasteful number, since it uses less digits than its factorization.

23720544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620 (or 3609 counting only the distinct ones).

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

The square root of 23720544 is about 4870.3741129404. The cubic root of 23720544 is about 287.3259700395.

The spelling of 23720544 in words is "twenty-three million, seven hundred twenty thousand, five hundred forty-four".