22292028 has 72 divisors (see below), whose sum is σ = 63017136. Its totient is φ = 6585600.

The previous prime is 22291999. The next prime is 22292033. The reversal of 22292028 is 82029222.

It is a junction number, because it is equal to n+sod(n) for n = 22291992 and 22292010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15550 + ... + 16922.

It is an arithmetic number, because the mean of its divisors is an integer number (875238).

Almost surely, 2^22292028 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 22292028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31508568).

22292028 is an abundant number, since it is smaller than the sum of its proper divisors (40725108).

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

22292028 is a wasteful number, since it uses less digits than its factorization.

22292028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1430 counting only the distinct ones).

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

The square root of 22292028 is about 4721.4434233611. The cubic root of 22292028 is about 281.4382964262.

The spelling of 22292028 in words is "twenty-two million, two hundred ninety-two thousand, twenty-eight".