28874855 has 8 divisors (see below), whose sum is σ = 34679232. Its totient is φ = 23080288.

The previous prime is 28874843. The next prime is 28874869. The reversal of 28874855 is 55847882.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28874855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8402 + ... + 11328.

It is an arithmetic number, because the mean of its divisors is an integer number (4334904).

Almost surely, 2^28874855 is an apocalyptic number.

28874855 is a deficient number, since it is larger than the sum of its proper divisors (5804377).

28874855 is a wasteful number, since it uses less digits than its factorization.

28874855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905.

The product of its digits is 716800, while the sum is 47.

The square root of 28874855 is about 5373.5328230132. The cubic root of 28874855 is about 306.7891084527.

The spelling of 28874855 in words is "twenty-eight million, eight hundred seventy-four thousand, eight hundred fifty-five".