28100255 has 16 divisors (see below), whose sum is σ = 34461504. Its totient is φ = 21991680.

The previous prime is 28100251. The next prime is 28100287. The reversal of 28100255 is 55200182.

It is not a de Polignac number, because 28100255 - 2² = 28100251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28100255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28100251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60725 + ... + 61185.

It is an arithmetic number, because the mean of its divisors is an integer number (2153844).

Almost surely, 2^28100255 is an apocalyptic number.

28100255 is a deficient number, since it is larger than the sum of its proper divisors (6361249).

28100255 is a wasteful number, since it uses less digits than its factorization.

28100255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 28100255 is about 5300.9673645477. The cubic root of 28100255 is about 304.0208860015.

The spelling of 28100255 in words is "twenty-eight million, one hundred thousand, two hundred fifty-five".