28863985 has 8 divisors (see below), whose sum is σ = 35125056. Its totient is φ = 22765680.

The previous prime is 28863971. The next prime is 28864001. The reversal of 28863985 is 58936882.

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

It is not a de Polignac number, because 28863985 - 2⁵ = 28863953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40299 + ... + 41008.

It is an arithmetic number, because the mean of its divisors is an integer number (4390632).

Almost surely, 2^28863985 is an apocalyptic number.

It is an amenable number.

28863985 is a deficient number, since it is larger than the sum of its proper divisors (6261071).

28863985 is an equidigital number, since it uses as much as digits as its factorization.

28863985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81383.

The product of its digits is 829440, while the sum is 49.

The square root of 28863985 is about 5372.5212889294. The cubic root of 28863985 is about 306.7506064855.

The spelling of 28863985 in words is "twenty-eight million, eight hundred sixty-three thousand, nine hundred eighty-five".