22401320 has 32 divisors (see below), whose sum is σ = 50607720. Its totient is φ = 8924160.

The previous prime is 22401299. The next prime is 22401331. The reversal of 22401320 is 2310422.

It can be written as a sum of positive squares in 4 ways, for example, as 20994724 + 1406596 = 4582^2 + 1186^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22401295 and 22401304.

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 in 7 ways as a sum of consecutive naturals, for example, 10244 + ... + 12236.

Almost surely, 2^22401320 is an apocalyptic number.

22401320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22401320 is an abundant number, since it is smaller than the sum of its proper divisors (28206400).

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

22401320 is a wasteful number, since it uses less digits than its factorization.

22401320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285 (or 2281 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22401320 is about 4733.0032748774. The cubic root of 22401320 is about 281.8974863371.

Adding to 22401320 its reverse (2310422), we get a palindrome (24711742).

The spelling of 22401320 in words is "twenty-two million, four hundred one thousand, three hundred twenty".