28589860 has 24 divisors (see below), whose sum is σ = 64657656. Its totient is φ = 10556160.

The previous prime is 28589849. The next prime is 28589879. The reversal of 28589860 is 6898582.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5607424 + 22982436 = 2368^2 + 4794^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28589860.

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, 54721 + ... + 55240.

It is an arithmetic number, because the mean of its divisors is an integer number (2694069).

Almost surely, 2^28589860 is an apocalyptic number.

28589860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28589860 is an abundant number, since it is smaller than the sum of its proper divisors (36067796).

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

28589860 is a wasteful number, since it uses less digits than its factorization.

28589860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109983 (or 109981 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 28589860 is about 5346.9486625551. The cubic root of 28589860 is about 305.7764325948.

The spelling of 28589860 in words is "twenty-eight million, five hundred eighty-nine thousand, eight hundred sixty".