22490028 has 72 divisors (see below), whose sum is σ = 64127280. Its totient is φ = 6811200.

The previous prime is 22490003. The next prime is 22490063. The reversal of 22490028 is 82009422.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 22489983 and 22490010.

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, 12208 + ... + 13928.

Almost surely, 2^22490028 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 22490028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32063640).

22490028 is an abundant number, since it is smaller than the sum of its proper divisors (41637252).

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

22490028 is a wasteful number, since it uses less digits than its factorization.

22490028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756 (or 1737 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 22490028 is about 4742.3652326661. The cubic root of 22490028 is about 282.2690957845.

The spelling of 22490028 in words is "twenty-two million, four hundred ninety thousand, twenty-eight".