22355628 has 48 divisors (see below), whose sum is σ = 55722240. Its totient is φ = 6955200.

The previous prime is 22355623. The next prime is 22355633. The reversal of 22355628 is 82655322.

It is an interprime number because it is at equal distance from previous prime (22355623) and next prime (22355633).

It is not an unprimeable number, because it can be changed into a prime (22355621) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15498 + ... + 16878.

It is an arithmetic number, because the mean of its divisors is an integer number (1160880).

Almost surely, 2^22355628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22355628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27861120).

22355628 is an abundant number, since it is smaller than the sum of its proper divisors (33366612).

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

22355628 is a wasteful number, since it uses less digits than its factorization.

22355628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478 (or 1476 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 22355628 is about 4728.1738546716. The cubic root of 22355628 is about 281.7056936613.

The spelling of 22355628 in words is "twenty-two million, three hundred fifty-five thousand, six hundred twenty-eight".