28810986 has 16 divisors (see below), whose sum is σ = 57691200. Its totient is φ = 9592128.

The previous prime is 28810981. The next prime is 28810993. The reversal of 28810986 is 68901882.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28810981) by changing a digit.

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, 3675 + ... + 8433.

It is an arithmetic number, because the mean of its divisors is an integer number (3605700).

Almost surely, 2^28810986 is an apocalyptic number.

28810986 is an abundant number, since it is smaller than the sum of its proper divisors (28880214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28810986 is a wasteful number, since it uses less digits than its factorization.

28810986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 28810986 is about 5367.5866085234. The cubic root of 28810986 is about 306.5627433518.

The spelling of 28810986 in words is "twenty-eight million, eight hundred ten thousand, nine hundred eighty-six".