28753273 has 4 divisors (see below), whose sum is σ = 30444660. Its totient is φ = 27061888.

The previous prime is 28753253. The next prime is 28753279. The reversal of 28753273 is 37235782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26656569 + 2096704 = 5163^2 + 1448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28753273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28753279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845668 + ... + 845701.

It is an arithmetic number, because the mean of its divisors is an integer number (7611165).

Almost surely, 2^28753273 is an apocalyptic number.

It is an amenable number.

28753273 is a deficient number, since it is larger than the sum of its proper divisors (1691387).

28753273 is a wasteful number, since it uses less digits than its factorization.

28753273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691386.

The product of its digits is 70560, while the sum is 37.

The square root of 28753273 is about 5362.2078475195. The cubic root of 28753273 is about 306.3579084958.

The spelling of 28753273 in words is "twenty-eight million, seven hundred fifty-three thousand, two hundred seventy-three".