22545400 has 96 divisors (see below), whose sum is σ = 58590000. Its totient is φ = 8017920.

The previous prime is 22545379. The next prime is 22545407. The reversal of 22545400 is 454522.

It is a super-2 number, since 2×22545400² = 1016590122320000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22545407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64426 + ... + 64774.

Almost surely, 2^22545400 is an apocalyptic number.

22545400 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 22545400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29295000).

22545400 is an abundant number, since it is smaller than the sum of its proper divisors (36044600).

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

22545400 is a wasteful number, since it uses less digits than its factorization.

22545400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 22545400 is about 4748.1996588181. The cubic root of 22545400 is about 282.5005612540.

Adding to 22545400 its reverse (454522), we get a palindrome (22999922).

The spelling of 22545400 in words is "twenty-two million, five hundred forty-five thousand, four hundred".