22228646 has 16 divisors (see below), whose sum is σ = 36875088. Its totient is φ = 9964800.

The previous prime is 22228631. The next prime is 22228667. The reversal of 22228646 is 64682222.

It is a super-2 number, since 2×22228646² = 988225405986632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5315 + ... + 8526.

It is an arithmetic number, because the mean of its divisors is an integer number (2304693).

Almost surely, 2^22228646 is an apocalyptic number.

22228646 is a deficient number, since it is larger than the sum of its proper divisors (14646442).

22228646 is a wasteful number, since it uses less digits than its factorization.

22228646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13927.

The product of its digits is 18432, while the sum is 32.

The square root of 22228646 is about 4714.7265032025. The cubic root of 22228646 is about 281.1713092774.

The spelling of 22228646 in words is "twenty-two million, two hundred twenty-eight thousand, six hundred forty-six".