28200122 has 16 divisors (see below), whose sum is σ = 43885800. Its totient is φ = 13574400.

The previous prime is 28200113. The next prime is 28200143. The reversal of 28200122 is 22100282.

It can be written as a sum of positive squares in 4 ways, for example, as 28185481 + 14641 = 5309^2 + 121^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28200122.

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, 34454 + ... + 35262.

Almost surely, 2^28200122 is an apocalyptic number.

28200122 is a deficient number, since it is larger than the sum of its proper divisors (15685678).

28200122 is a wasteful number, since it uses less digits than its factorization.

28200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 28200122 is about 5310.3787058928. The cubic root of 28200122 is about 304.3806188782.

The spelling of 28200122 in words is "twenty-eight million, two hundred thousand, one hundred twenty-two".