28092805 has 16 divisors (see below), whose sum is σ = 37288944. Its totient is φ = 20183040.

The previous prime is 28092787. The next prime is 28092859. The reversal of 28092805 is 50829082.

It can be written as a sum of positive squares in 8 ways, for example, as 34596 + 28058209 = 186^2 + 5297^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28092805 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 15 ways as a sum of consecutive naturals, for example, 3436 + ... + 8245.

It is an arithmetic number, because the mean of its divisors is an integer number (2330559).

Almost surely, 2^28092805 is an apocalyptic number.

It is an amenable number.

28092805 is a deficient number, since it is larger than the sum of its proper divisors (9196139).

28092805 is a wasteful number, since it uses less digits than its factorization.

28092805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11736.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 28092805 is about 5300.2646160357. The cubic root of 28092805 is about 303.9940160699.

The spelling of 28092805 in words is "twenty-eight million, ninety-two thousand, eight hundred five".