28082805 has 16 divisors (see below), whose sum is σ = 45049344. Its totient is φ = 14938560.

The previous prime is 28082783. The next prime is 28082809. The reversal of 28082805 is 50828082.

It is not a de Polignac number, because 28082805 - 2⁹ = 28082293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28082809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4092 + ... + 8538.

It is an arithmetic number, because the mean of its divisors is an integer number (2815584).

Almost surely, 2^28082805 is an apocalyptic number.

It is an amenable number.

28082805 is a deficient number, since it is larger than the sum of its proper divisors (16966539).

28082805 is a wasteful number, since it uses less digits than its factorization.

28082805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4876.

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 28082805 is about 5299.3211829441. The cubic root of 28082805 is about 303.9579415788.

The spelling of 28082805 in words is "twenty-eight million, eighty-two thousand, eight hundred five".