28713273 has 4 divisors (see below), whose sum is σ = 38284368. Its totient is φ = 19142180.

The previous prime is 28713271. The next prime is 28713281. The reversal of 28713273 is 37231782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28713273 - 2¹ = 28713271 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28713271) 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, 4785543 + ... + 4785548.

It is an arithmetic number, because the mean of its divisors is an integer number (9571092).

Almost surely, 2^28713273 is an apocalyptic number.

It is an amenable number.

28713273 is a deficient number, since it is larger than the sum of its proper divisors (9571095).

28713273 is an equidigital number, since it uses as much as digits as its factorization.

28713273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9571094.

The product of its digits is 14112, while the sum is 33.

The square root of 28713273 is about 5358.4767425081. The cubic root of 28713273 is about 306.2157797110.

The spelling of 28713273 in words is "twenty-eight million, seven hundred thirteen thousand, two hundred seventy-three".