22400705 has 4 divisors (see below), whose sum is σ = 26880852. Its totient is φ = 17920560.

The previous prime is 22400701. The next prime is 22400711. The reversal of 22400705 is 50700422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50700422 = 2 ⋅25350211.

It can be written as a sum of positive squares in 2 ways, for example, as 12559936 + 9840769 = 3544^2 + 3137^2 .

It is not a de Polignac number, because 22400705 - 2² = 22400701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22400701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2240066 + ... + 2240075.

It is an arithmetic number, because the mean of its divisors is an integer number (6720213).

Almost surely, 2^22400705 is an apocalyptic number.

It is an amenable number.

22400705 is a deficient number, since it is larger than the sum of its proper divisors (4480147).

22400705 is an equidigital number, since it uses as much as digits as its factorization.

22400705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480146.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 22400705 is about 4732.9383051124. The cubic root of 22400705 is about 281.8949066001.

The spelling of 22400705 in words is "twenty-two million, four hundred thousand, seven hundred five".