28269985 has 8 divisors (see below), whose sum is σ = 35018496. Its totient is φ = 21886320.

The previous prime is 28269979. The next prime is 28270003. The reversal of 28269985 is 58996282.

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

It is not a de Polignac number, because 28269985 - 2³ = 28269977 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, 91039 + ... + 91348.

It is an arithmetic number, because the mean of its divisors is an integer number (4377312).

Almost surely, 2^28269985 is an apocalyptic number.

It is an amenable number.

28269985 is a deficient number, since it is larger than the sum of its proper divisors (6748511).

28269985 is a wasteful number, since it uses less digits than its factorization.

28269985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182423.

The product of its digits is 622080, while the sum is 49.

The square root of 28269985 is about 5316.9526046411. The cubic root of 28269985 is about 304.6317691713.

The spelling of 28269985 in words is "twenty-eight million, two hundred sixty-nine thousand, nine hundred eighty-five".