28275811 has 16 divisors (see below), whose sum is σ = 31325184. Its totient is φ = 25409664.

The previous prime is 28275803. The next prime is 28275817. The reversal of 28275811 is 11857282.

It is a cyclic number.

It is not a de Polignac number, because 28275811 - 2³ = 28275803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28275817) 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, 33946 + ... + 34768.

It is an arithmetic number, because the mean of its divisors is an integer number (1957824).

Almost surely, 2^28275811 is an apocalyptic number.

28275811 is a deficient number, since it is larger than the sum of its proper divisors (3049373).

28275811 is a wasteful number, since it uses less digits than its factorization.

28275811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930.

The product of its digits is 8960, while the sum is 34.

The square root of 28275811 is about 5317.5004466384. The cubic root of 28275811 is about 304.6526943419.

The spelling of 28275811 in words is "twenty-eight million, two hundred seventy-five thousand, eight hundred eleven".