28831255 has 8 divisors (see below), whose sum is σ = 34710624. Its totient is φ = 22989600.

The previous prime is 28831247. The next prime is 28831261. The reversal of 28831255 is 55213882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28831255 - 2³ = 28831247 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 28831255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7716 + ... + 10825.

It is an arithmetic number, because the mean of its divisors is an integer number (4338828).

Almost surely, 2^28831255 is an apocalyptic number.

28831255 is a deficient number, since it is larger than the sum of its proper divisors (5879369).

28831255 is a wasteful number, since it uses less digits than its factorization.

28831255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18857.

The product of its digits is 19200, while the sum is 34.

The square root of 28831255 is about 5369.4743690607. The cubic root of 28831255 is about 306.6346171348.

The spelling of 28831255 in words is "twenty-eight million, eight hundred thirty-one thousand, two hundred fifty-five".