28055872 has 28 divisors (see below), whose sum is σ = 59957716. Its totient is φ = 12948480.

The previous prime is 28055869. The next prime is 28055873. The reversal of 28055872 is 27855082.

It can be written as a sum of positive squares in 2 ways, for example, as 2005056 + 26050816 = 1416^2 + 5104^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16029 + ... + 17692.

It is an arithmetic number, because the mean of its divisors is an integer number (2141347).

Almost surely, 2^28055872 is an apocalyptic number.

It is an amenable number.

28055872 is an abundant number, since it is smaller than the sum of its proper divisors (31901844).

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

28055872 is a wasteful number, since it uses less digits than its factorization.

28055872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33746 (or 33736 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 28055872 is about 5296.7793988423. The cubic root of 28055872 is about 303.8607395395.

The spelling of 28055872 in words is "twenty-eight million, fifty-five thousand, eight hundred seventy-two".