22669728 has 24 divisors (see below), whose sum is σ = 59508288. Its totient is φ = 7556544.

The previous prime is 22669727. The next prime is 22669739. The reversal of 22669728 is 82796622.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22669728.

It is not an unprimeable number, because it can be changed into a prime (22669727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117976 + ... + 118167.

It is an arithmetic number, because the mean of its divisors is an integer number (2479512).

Almost surely, 2^22669728 is an apocalyptic number.

It is an amenable number.

22669728 is an abundant number, since it is smaller than the sum of its proper divisors (36838560).

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

22669728 is a wasteful number, since it uses less digits than its factorization.

22669728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236156 (or 236148 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 22669728 is about 4761.2737791478. The cubic root of 22669728 is about 283.0188985452.

The spelling of 22669728 in words is "twenty-two million, six hundred sixty-nine thousand, seven hundred twenty-eight".