28695773 has 4 divisors (see below), whose sum is σ = 28730268. Its totient is φ = 28661280.

The previous prime is 28695769. The next prime is 28695787. The reversal of 28695773 is 37759682.

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 11539609 + 17156164 = 3397^2 + 4142^2 .

It is a cyclic number.

It is not a de Polignac number, because 28695773 - 2² = 28695769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28695763) 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, 15968 + ... + 17673.

It is an arithmetic number, because the mean of its divisors is an integer number (7182567).

Almost surely, 2^28695773 is an apocalyptic number.

It is an amenable number.

28695773 is a deficient number, since it is larger than the sum of its proper divisors (34495).

28695773 is an equidigital number, since it uses as much as digits as its factorization.

28695773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34494.

The product of its digits is 635040, while the sum is 47.

The square root of 28695773 is about 5356.8435668778. The cubic root of 28695773 is about 306.1535568592.

The spelling of 28695773 in words is "twenty-eight million, six hundred ninety-five thousand, seven hundred seventy-three".