22401824 has 12 divisors (see below), whose sum is σ = 44103654. Its totient is φ = 11200896.

The previous prime is 22401811. The next prime is 22401851. The reversal of 22401824 is 42810422.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22391824 + 10000 = 4732^2 + 100^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22401824.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 349997 + ... + 350060.

Almost surely, 2^22401824 is an apocalyptic number.

It is an amenable number.

22401824 is a deficient number, since it is larger than the sum of its proper divisors (21701830).

22401824 is an equidigital number, since it uses as much as digits as its factorization.

22401824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700067 (or 700059 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 22401824 is about 4733.0565177272. The cubic root of 22401824 is about 281.8996004278.

The spelling of 22401824 in words is "twenty-two million, four hundred one thousand, eight hundred twenty-four".