22205728 has 24 divisors (see below), whose sum is σ = 44545788. Its totient is φ = 10892544.

The previous prime is 22205713. The next prime is 22205731. The reversal of 22205728 is 82750222.

It can be written as a sum of positive squares in 2 ways, for example, as 19607184 + 2598544 = 4428^2 + 1612^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22205696 and 22205705.

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, 4851 + ... + 8242.

Almost surely, 2^22205728 is an apocalyptic number.

It is an amenable number.

22205728 is an abundant number, since it is smaller than the sum of its proper divisors (22340060).

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

22205728 is a wasteful number, since it uses less digits than its factorization.

22205728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13156 (or 13148 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 22205728 is about 4712.2954066994. The cubic root of 22205728 is about 281.0746457213.

The spelling of 22205728 in words is "twenty-two million, two hundred five thousand, seven hundred twenty-eight".