22427028 has 72 divisors (see below), whose sum is σ = 61625928. Its totient is φ = 6835968.

The previous prime is 22426993. The next prime is 22427039. The reversal of 22427028 is 82072422.

It can be written as a sum of positive squares in 4 ways, for example, as 1468944 + 20958084 = 1212^2 + 4578^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22426992 and 22427010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80826 + ... + 81102.

Almost surely, 2^22427028 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 22427028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30812964).

22427028 is an abundant number, since it is smaller than the sum of its proper divisors (39198900).

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

22427028 is a wasteful number, since it uses less digits than its factorization.

22427028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 468 counting only the distinct ones).

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

The square root of 22427028 is about 4735.7183193260. The cubic root of 22427028 is about 282.0052813256.

The spelling of 22427028 in words is "twenty-two million, four hundred twenty-seven thousand, twenty-eight".