28885985 has 8 divisors (see below), whose sum is σ = 36487680. Its totient is φ = 21892464.

The previous prime is 28885979. The next prime is 28885993. The reversal of 28885985 is 58958882.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28885985 - 2¹⁴ = 28869601 is a prime.

It is a Curzon 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, 151937 + ... + 152126.

It is an arithmetic number, because the mean of its divisors is an integer number (4560960).

Almost surely, 2^28885985 is an apocalyptic number.

It is an amenable number.

28885985 is a deficient number, since it is larger than the sum of its proper divisors (7601695).

28885985 is a wasteful number, since it uses less digits than its factorization.

28885985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304087.

The product of its digits is 1843200, while the sum is 53.

The square root of 28885985 is about 5374.5683547612. The cubic root of 28885985 is about 306.8285213392.

The spelling of 28885985 in words is "twenty-eight million, eight hundred eighty-five thousand, nine hundred eighty-five".