28332985 has 8 divisors (see below), whose sum is σ = 34030656. Its totient is φ = 22645680.

The previous prime is 28332973. The next prime is 28332989. The reversal of 28332985 is 58923382.

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

It is not a de Polignac number, because 28332985 - 2¹⁷ = 28201913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28332989) by changing a digit.

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, 6052 + ... + 9658.

It is an arithmetic number, because the mean of its divisors is an integer number (4253832).

Almost surely, 2^28332985 is an apocalyptic number.

It is an amenable number.

28332985 is a deficient number, since it is larger than the sum of its proper divisors (5697671).

28332985 is a wasteful number, since it uses less digits than its factorization.

28332985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183.

The product of its digits is 103680, while the sum is 40.

The square root of 28332985 is about 5322.8737539040. The cubic root of 28332985 is about 304.8578931292.

The spelling of 28332985 in words is "twenty-eight million, three hundred thirty-two thousand, nine hundred eighty-five".