28681273 has 8 divisors (see below), whose sum is σ = 29131200. Its totient is φ = 28234800.

The previous prime is 28681217. The next prime is 28681283. The reversal of 28681273 is 37218682.

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 28681273 - 2⁹ = 28680761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28681283) 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, 19386 + ... + 20812.

It is an arithmetic number, because the mean of its divisors is an integer number (3641400).

Almost surely, 2^28681273 is an apocalyptic number.

It is an amenable number.

28681273 is a deficient number, since it is larger than the sum of its proper divisors (449927).

28681273 is a wasteful number, since it uses less digits than its factorization.

28681273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727.

The product of its digits is 32256, while the sum is 37.

The square root of 28681273 is about 5355.4899869200. The cubic root of 28681273 is about 306.1019816150.

The spelling of 28681273 in words is "twenty-eight million, six hundred eighty-one thousand, two hundred seventy-three".