28712273 has 16 divisors (see below), whose sum is σ = 30373056. Its totient is φ = 27119040.

The previous prime is 28712263. The next prime is 28712279. The reversal of 28712273 is 37221782.

It is not a de Polignac number, because 28712273 - 2²⁴ = 11935057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28712279) 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 15 ways as a sum of consecutive naturals, for example, 268286 + ... + 268392.

It is an arithmetic number, because the mean of its divisors is an integer number (1898316).

Almost surely, 2^28712273 is an apocalyptic number.

It is an amenable number.

28712273 is a deficient number, since it is larger than the sum of its proper divisors (1660783).

28712273 is a wasteful number, since it uses less digits than its factorization.

28712273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304.

The product of its digits is 9408, while the sum is 32.

The square root of 28712273 is about 5358.3834315958. The cubic root of 28712273 is about 306.2122248007.

The spelling of 28712273 in words is "twenty-eight million, seven hundred twelve thousand, two hundred seventy-three".