28797085 has 4 divisors (see below), whose sum is σ = 34556508. Its totient is φ = 23037664.

The previous prime is 28797079. The next prime is 28797101. The reversal of 28797085 is 58079782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58079782 = 2 ⋅29039891.

It can be written as a sum of positive squares in 2 ways, for example, as 8538084 + 20259001 = 2922^2 + 4501^2 .

It is a cyclic number.

It is not a de Polignac number, because 28797085 - 2⁵ = 28797053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2879704 + ... + 2879713.

It is an arithmetic number, because the mean of its divisors is an integer number (8639127).

Almost surely, 2^28797085 is an apocalyptic number.

It is an amenable number.

28797085 is a deficient number, since it is larger than the sum of its proper divisors (5759423).

28797085 is an equidigital number, since it uses as much as digits as its factorization.

28797085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759422.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 28797085 is about 5366.2915500371. The cubic root of 28797085 is about 306.5134309789.

The spelling of 28797085 in words is "twenty-eight million, seven hundred ninety-seven thousand, eighty-five".