22155628 has 24 divisors (see below), whose sum is σ = 42532560. Its totient is φ = 10014720.

The previous prime is 22155619. The next prime is 22155649. The reversal of 22155628 is 82655122.

It is a self number, because there is not a number n which added to its sum of digits gives 22155628.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7188 + ... + 9796.

It is an arithmetic number, because the mean of its divisors is an integer number (1772190).

Almost surely, 2^22155628 is an apocalyptic number.

It is an amenable number.

22155628 is a deficient number, since it is larger than the sum of its proper divisors (20376932).

22155628 is a wasteful number, since it uses less digits than its factorization.

22155628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817 (or 2815 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 22155628 is about 4706.9765242669. The cubic root of 22155628 is about 280.8631020540.

The spelling of 22155628 in words is "twenty-two million, one hundred fifty-five thousand, six hundred twenty-eight".