28006273 has 4 divisors (see below), whose sum is σ = 28032768. Its totient is φ = 27979780.

The previous prime is 28006271. The next prime is 28006283. The reversal of 28006273 is 37260082.

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 28006273 - 2¹ = 28006271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28006271) 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 3 ways as a sum of consecutive naturals, for example, 11593 + ... + 13798.

It is an arithmetic number, because the mean of its divisors is an integer number (7008192).

Almost surely, 2^28006273 is an apocalyptic number.

It is an amenable number.

28006273 is a deficient number, since it is larger than the sum of its proper divisors (26495).

28006273 is a wasteful number, since it uses less digits than its factorization.

28006273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26494.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 28006273 is about 5292.0953317188. The cubic root of 28006273 is about 303.6815723069.

The spelling of 28006273 in words is "twenty-eight million, six thousand, two hundred seventy-three".