23522730 has 128 divisors (see below), whose sum is σ = 74649600. Its totient is φ = 4592640.

The previous prime is 23522729. The next prime is 23522731. The reversal of 23522730 is 3722532.

It is an interprime number because it is at equal distance from previous prime (23522729) and next prime (23522731).

It is a self number, because there is not a number n which added to its sum of digits gives 23522730.

It is not an unprimeable number, because it can be changed into a prime (23522731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38971 + ... + 39569.

It is an arithmetic number, because the mean of its divisors is an integer number (583200).

Almost surely, 2^23522730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23522730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37324800).

23522730 is an abundant number, since it is smaller than the sum of its proper divisors (51126870).

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

23522730 is a wasteful number, since it uses less digits than its factorization.

23522730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 23522730 is about 4850.0237112822. The cubic root of 23522730 is about 286.5250351986.

It can be divided in two parts, 23 and 522730, that added together give a triangular number (522753 = T₁₀₂₂).

The spelling of 23522730 in words is "twenty-three million, five hundred twenty-two thousand, seven hundred thirty".