22259840 has 32 divisors (see below), whose sum is σ = 53216460. Its totient is φ = 8903680.

The previous prime is 22259833. The next prime is 22259863. The reversal of 22259840 is 4895222.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 506944 = 4664^2 + 712^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 22259797 and 22259806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16751 + ... + 18030.

Almost surely, 2^22259840 is an apocalyptic number.

22259840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22259840 is an abundant number, since it is smaller than the sum of its proper divisors (30956620).

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

22259840 is an equidigital number, since it uses as much as digits as its factorization.

22259840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34800 (or 34788 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 22259840 is about 4718.0334886476. The cubic root of 22259840 is about 281.3027726488.

The spelling of 22259840 in words is "twenty-two million, two hundred fifty-nine thousand, eight hundred forty".