22116400 has 30 divisors (see below), whose sum is σ = 53135612. Its totient is φ = 8846400.

The previous prime is 22116397. The next prime is 22116431. The reversal of 22116400 is 461122.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27246 + ... + 28045.

Almost surely, 2^22116400 is an apocalyptic number.

22116400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22116400 is an abundant number, since it is smaller than the sum of its proper divisors (31019212).

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

22116400 is a wasteful number, since it uses less digits than its factorization.

22116400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55309 (or 55298 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 22116400 is about 4702.8076720189. The cubic root of 22116400 is about 280.6972419139.

Adding to 22116400 its reverse (461122), we get a palindrome (22577522).

The spelling of 22116400 in words is "twenty-two million, one hundred sixteen thousand, four hundred".