28546985 has 4 divisors (see below), whose sum is σ = 34256388. Its totient is φ = 22837584.

The previous prime is 28546981. The next prime is 28546993. The reversal of 28546985 is 58964582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17007376 + 11539609 = 4124^2 + 3397^2 .

It is a cyclic number.

It is not a de Polignac number, because 28546985 - 2² = 28546981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28546981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2854694 + ... + 2854703.

It is an arithmetic number, because the mean of its divisors is an integer number (8564097).

Almost surely, 2^28546985 is an apocalyptic number.

It is an amenable number.

28546985 is a deficient number, since it is larger than the sum of its proper divisors (5709403).

28546985 is an equidigital number, since it uses as much as digits as its factorization.

28546985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5709402.

The product of its digits is 691200, while the sum is 47.

The square root of 28546985 is about 5342.9378622627. The cubic root of 28546985 is about 305.6235028078.

The spelling of 28546985 in words is "twenty-eight million, five hundred forty-six thousand, nine hundred eighty-five".