22304400 has 60 divisors (see below), whose sum is σ = 71452272. Its totient is φ = 5947520.

The previous prime is 22304389. The next prime is 22304413. The reversal of 22304400 is 440322.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22304400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8094 + ... + 10493.

Almost surely, 2^22304400 is an apocalyptic number.

22304400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22304400 is an abundant number, since it is smaller than the sum of its proper divisors (49147872).

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

22304400 is a wasteful number, since it uses less digits than its factorization.

22304400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18608 (or 18597 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 22304400 is about 4722.7534341738. The cubic root of 22304400 is about 281.4903525640.

Adding to 22304400 its reverse (440322), we get a palindrome (22744722).

The spelling of 22304400 in words is "twenty-two million, three hundred four thousand, four hundred".