28862855 has 32 divisors (see below), whose sum is σ = 42301440. Its totient is φ = 18455040.

The previous prime is 28862833. The next prime is 28862857. The reversal of 28862855 is 55826882.

It is not a de Polignac number, because 28862855 - 2⁶ = 28862791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28862857) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 106370 + ... + 106640.

It is an arithmetic number, because the mean of its divisors is an integer number (1321920).

Almost surely, 2^28862855 is an apocalyptic number.

28862855 is a deficient number, since it is larger than the sum of its proper divisors (13438585).

28862855 is a wasteful number, since it uses less digits than its factorization.

28862855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479.

The product of its digits is 307200, while the sum is 44.

The square root of 28862855 is about 5372.4161231237. The cubic root of 28862855 is about 306.7466034265.

The spelling of 28862855 in words is "twenty-eight million, eight hundred sixty-two thousand, eight hundred fifty-five".