28855455 has 16 divisors (see below), whose sum is σ = 48176640. Its totient is φ = 14720288.

The previous prime is 28855447. The next prime is 28855457. The reversal of 28855455 is 55455882.

It is a cyclic number.

It is not a de Polignac number, because 28855455 - 2³ = 28855447 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28855457) 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, 41475 + ... + 42164.

It is an arithmetic number, because the mean of its divisors is an integer number (3011040).

Almost surely, 2^28855455 is an apocalyptic number.

28855455 is a deficient number, since it is larger than the sum of its proper divisors (19321185).

28855455 is a wasteful number, since it uses less digits than its factorization.

28855455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83670.

The product of its digits is 320000, while the sum is 42.

The square root of 28855455 is about 5371.7273758075. The cubic root of 28855455 is about 306.7203861207.

The spelling of 28855455 in words is "twenty-eight million, eight hundred fifty-five thousand, four hundred fifty-five".