28064273 has 4 divisors (see below), whose sum is σ = 29541360. Its totient is φ = 26587188.

The previous prime is 28064249. The next prime is 28064287. The reversal of 28064273 is 37246082.

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 28064273 - 2¹⁴ = 28047889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28064293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738515 + ... + 738552.

It is an arithmetic number, because the mean of its divisors is an integer number (7385340).

Almost surely, 2^28064273 is an apocalyptic number.

It is an amenable number.

28064273 is a deficient number, since it is larger than the sum of its proper divisors (1477087).

28064273 is a wasteful number, since it uses less digits than its factorization.

28064273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477086.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 28064273 is about 5297.5723685477. The cubic root of 28064273 is about 303.8910656844.

The spelling of 28064273 in words is "twenty-eight million, sixty-four thousand, two hundred seventy-three".