22140400 has 30 divisors (see below), whose sum is σ = 53193272. Its totient is φ = 8856000.

The previous prime is 22140383. The next prime is 22140439. The reversal of 22140400 is 404122.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 27276 + ... + 28075.

Almost surely, 2^22140400 is an apocalyptic number.

22140400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22140400 is an abundant number, since it is smaller than the sum of its proper divisors (31052872).

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

22140400 is a wasteful number, since it uses less digits than its factorization.

22140400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55369 (or 55358 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22140400 is about 4705.3586473297. The cubic root of 22140400 is about 280.7987397232.

Adding to 22140400 its reverse (404122), we get a palindrome (22544522).

The spelling of 22140400 in words is "twenty-two million, one hundred forty thousand, four hundred".