22228272 has 60 divisors (see below), whose sum is σ = 67868424. Its totient is φ = 6735360.

The previous prime is 22228249. The next prime is 22228279. The reversal of 22228272 is 27282222.

It is a super-2 number, since 2×22228272² = 988192152211968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22228279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5433 + ... + 8600.

Almost surely, 2^22228272 is an apocalyptic number.

22228272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22228272 is an abundant number, since it is smaller than the sum of its proper divisors (45640152).

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

22228272 is a wasteful number, since it uses less digits than its factorization.

22228272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14058 (or 14049 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 22228272 is about 4714.6868400775. The cubic root of 22228272 is about 281.1697323534.

It can be divided in two parts, 22228 and 272, that added together give a square (22500 = 150²).

The spelling of 22228272 in words is "twenty-two million, two hundred twenty-eight thousand, two hundred seventy-two".