22644228 has 12 divisors (see below), whose sum is σ = 52836560. Its totient is φ = 7548072.

The previous prime is 22644217. The next prime is 22644247. The reversal of 22644228 is 82244622.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×22644228² = 1025522123431968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22644195 and 22644204.

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, 943498 + ... + 943521.

Almost surely, 2^22644228 is an apocalyptic number.

It is an amenable number.

22644228 is an abundant number, since it is smaller than the sum of its proper divisors (30192332).

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

22644228 is a wasteful number, since it uses less digits than its factorization.

22644228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887026 (or 1887024 counting only the distinct ones).

The product of its digits is 12288, while the sum is 30.

The square root of 22644228 is about 4758.5951708461. The cubic root of 22644228 is about 282.9127409768.

The spelling of 22644228 in words is "twenty-two million, six hundred forty-four thousand, two hundred twenty-eight".