28806985 has 8 divisors (see below), whose sum is σ = 35084736. Its totient is φ = 22701360.

The previous prime is 28806929. The next prime is 28806989. The reversal of 28806985 is 58960882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28806985 - 2¹³ = 28798793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28806989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42661 + ... + 43330.

It is an arithmetic number, because the mean of its divisors is an integer number (4385592).

Almost surely, 2^28806985 is an apocalyptic number.

It is an amenable number.

28806985 is a deficient number, since it is larger than the sum of its proper divisors (6277751).

28806985 is an equidigital number, since it uses as much as digits as its factorization.

28806985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86063.

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

The square root of 28806985 is about 5367.2138954955. The cubic root of 28806985 is about 306.5485518403.

It can be divided in two parts, 28806 and 985, that added together give a cube (29791 = 31³).

The spelling of 28806985 in words is "twenty-eight million, eight hundred six thousand, nine hundred eighty-five".