28283805 has 24 divisors (see below), whose sum is σ = 53483040. Its totient is φ = 13713120.

The previous prime is 28283803. The next prime is 28283807. The reversal of 28283805 is 50838282.

It is an interprime number because it is at equal distance from previous prime (28283803) and next prime (28283807).

It is not a de Polignac number, because 28283805 - 2¹ = 28283803 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28283805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28283803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28075 + ... + 29064.

It is an arithmetic number, because the mean of its divisors is an integer number (2228460).

Almost surely, 2^28283805 is an apocalyptic number.

It is an amenable number.

28283805 is a deficient number, since it is larger than the sum of its proper divisors (25199235).

28283805 is a wasteful number, since it uses less digits than its factorization.

28283805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57161 (or 57158 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 28283805 is about 5318.2520624732. The cubic root of 28283805 is about 304.6814016136.

The spelling of 28283805 in words is "twenty-eight million, two hundred eighty-three thousand, eight hundred five".