28885155 has 32 divisors (see below), whose sum is σ = 50125824. Its totient is φ = 14119296.

The previous prime is 28885141. The next prime is 28885163. The reversal of 28885155 is 55158882.

It is not a de Polignac number, because 28885155 - 2¹² = 28881059 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32122 + ... + 33008.

It is an arithmetic number, because the mean of its divisors is an integer number (1566432).

Almost surely, 2^28885155 is an apocalyptic number.

28885155 is a deficient number, since it is larger than the sum of its proper divisors (21240669).

28885155 is a wasteful number, since it uses less digits than its factorization.

28885155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075.

The product of its digits is 128000, while the sum is 42.

The square root of 28885155 is about 5374.4911387033. The cubic root of 28885155 is about 306.8255825425.

The spelling of 28885155 in words is "twenty-eight million, eight hundred eighty-five thousand, one hundred fifty-five".