22445778 has 16 divisors (see below), whose sum is σ = 45986976. Its totient is φ = 7299360.

The previous prime is 22445771. The next prime is 22445809. The reversal of 22445778 is 87754422.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22445771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45376 + ... + 45867.

It is an arithmetic number, because the mean of its divisors is an integer number (2874186).

Almost surely, 2^22445778 is an apocalyptic number.

22445778 is an abundant number, since it is smaller than the sum of its proper divisors (23541198).

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

22445778 is a wasteful number, since it uses less digits than its factorization.

22445778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91289.

The product of its digits is 125440, while the sum is 39.

The square root of 22445778 is about 4737.6975420556. The cubic root of 22445778 is about 282.0838491167.

The spelling of 22445778 in words is "twenty-two million, four hundred forty-five thousand, seven hundred seventy-eight".