22504400 has 60 divisors (see below), whose sum is σ = 54615552. Its totient is φ = 8910720.

The previous prime is 22504397. The next prime is 22504403. The reversal of 22504400 is 440522.

It is an interprime number because it is at equal distance from previous prime (22504397) and next prime (22504403).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22504403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50579 + ... + 51021.

Almost surely, 2^22504400 is an apocalyptic number.

22504400 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 22504400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27307776).

22504400 is an abundant number, since it is smaller than the sum of its proper divisors (32111152).

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

22504400 is a wasteful number, since it uses less digits than its factorization.

22504400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 22504400 is about 4743.8802683036. The cubic root of 22504400 is about 282.3292099472.

Adding to 22504400 its reverse (440522), we get a palindrome (22944922).

The spelling of 22504400 in words is "twenty-two million, five hundred four thousand, four hundred".