28272255 has 48 divisors (see below), whose sum is σ = 51186912. Its totient is φ = 13305600.

The previous prime is 28272203. The next prime is 28272259. The reversal of 28272255 is 55227282.

It is not a de Polignac number, because 28272255 - 2⁹ = 28271743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28272259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66945 + ... + 67365.

It is an arithmetic number, because the mean of its divisors is an integer number (1066394).

Almost surely, 2^28272255 is an apocalyptic number.

28272255 is a deficient number, since it is larger than the sum of its proper divisors (22914657).

28272255 is a wasteful number, since it uses less digits than its factorization.

28272255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 477 counting only the distinct ones).

The product of its digits is 22400, while the sum is 33.

The square root of 28272255 is about 5317.1660684993. The cubic root of 28272255 is about 304.6399226434.

The spelling of 28272255 in words is "twenty-eight million, two hundred seventy-two thousand, two hundred fifty-five".