28512255 has 16 divisors (see below), whose sum is σ = 48021120. Its totient is φ = 14406048.

The previous prime is 28512229. The next prime is 28512257. The reversal of 28512255 is 55221582.

It is not a de Polignac number, because 28512255 - 2²⁴ = 11735039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28512257) 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, 49737 + ... + 50306.

It is an arithmetic number, because the mean of its divisors is an integer number (3001320).

Almost surely, 2^28512255 is an apocalyptic number.

28512255 is a deficient number, since it is larger than the sum of its proper divisors (19508865).

28512255 is a wasteful number, since it uses less digits than its factorization.

28512255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100070.

The product of its digits is 8000, while the sum is 30.

The square root of 28512255 is about 5339.6867885673. The cubic root of 28512255 is about 305.4995129296.

The spelling of 28512255 in words is "twenty-eight million, five hundred twelve thousand, two hundred fifty-five".