22791028 has 24 divisors (see below), whose sum is σ = 43357160. Its totient is φ = 10419840.

The previous prime is 22791019. The next prime is 22791037. The reversal of 22791028 is 82019722.

It is an interprime number because it is at equal distance from previous prime (22791019) and next prime (22791037).

It can be written as a sum of positive squares in 4 ways, for example, as 19044 + 22771984 = 138^2 + 4772^2 .

It is a congruent number.

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, 3658 + ... + 7678.

Almost surely, 2^22791028 is an apocalyptic number.

It is an amenable number.

22791028 is a deficient number, since it is larger than the sum of its proper divisors (20566132).

22791028 is a wasteful number, since it uses less digits than its factorization.

22791028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4147 (or 4145 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 22791028 is about 4773.9949727665. The cubic root of 22791028 is about 283.5227884762.

The spelling of 22791028 in words is "twenty-two million, seven hundred ninety-one thousand, twenty-eight".