22723228 has 12 divisors (see below), whose sum is σ = 43380792. Its totient is φ = 10328720.

The previous prime is 22723199. The next prime is 22723277. The reversal of 22723228 is 82232722.

It is a junction number, because it is equal to n+sod(n) for n = 22723196 and 22723205.

It is a congruent number.

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, 258175 + ... + 258262.

It is an arithmetic number, because the mean of its divisors is an integer number (3615066).

Almost surely, 2^22723228 is an apocalyptic number.

It is an amenable number.

22723228 is a deficient number, since it is larger than the sum of its proper divisors (20657564).

22723228 is a wasteful number, since it uses less digits than its factorization.

22723228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516452 (or 516450 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 22723228 is about 4766.8887127769. Note that the first 3 decimals coincide. The cubic root of 22723228 is about 283.2413628446.

The spelling of 22723228 in words is "twenty-two million, seven hundred twenty-three thousand, two hundred twenty-eight".