22244778 has 12 divisors (see below), whose sum is σ = 48197058. Its totient is φ = 7414920.

The previous prime is 22244777. The next prime is 22244851. The reversal of 22244778 is 87744222.

It can be written as a sum of positive squares in only one way, i.e., 12341169 + 9903609 = 3513^2 + 3147^2 .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22244777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617893 + ... + 617928.

Almost surely, 2^22244778 is an apocalyptic number.

22244778 is an abundant number, since it is smaller than the sum of its proper divisors (25952280).

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

22244778 is a wasteful number, since it uses less digits than its factorization.

22244778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235829 (or 1235826 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 22244778 is about 4716.4370026536. The cubic root of 22244778 is about 281.2393110012.

The spelling of 22244778 in words is "twenty-two million, two hundred forty-four thousand, seven hundred seventy-eight".