28510985 has 8 divisors (see below), whose sum is σ = 34460160. Its totient is φ = 22644144.

The previous prime is 28510969. The next prime is 28510991. The reversal of 28510985 is 58901582.

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 28510985 - 2⁴ = 28510969 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19817 + ... + 21206.

It is an arithmetic number, because the mean of its divisors is an integer number (4307520).

Almost surely, 2^28510985 is an apocalyptic number.

It is an amenable number.

28510985 is a deficient number, since it is larger than the sum of its proper divisors (5949175).

28510985 is a wasteful number, since it uses less digits than its factorization.

28510985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41167.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 28510985 is about 5339.5678664102. The cubic root of 28510985 is about 305.4949769836.

The spelling of 28510985 in words is "twenty-eight million, five hundred ten thousand, nine hundred eighty-five".