28275705 has 24 divisors (see below), whose sum is σ = 51592320. Its totient is φ = 14286240.

The previous prime is 28275697. The next prime is 28275719. The reversal of 28275705 is 50757282.

28275705 is a `hidden beast` number, since 2 + 82 + 7 + 570 + 5 = 666.

It is not a de Polignac number, because 28275705 - 2³ = 28275697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28275705.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15681 + ... + 17390.

It is an arithmetic number, because the mean of its divisors is an integer number (2149680).

Almost surely, 2^28275705 is an apocalyptic number.

It is an amenable number.

28275705 is a deficient number, since it is larger than the sum of its proper divisors (23316615).

28275705 is a wasteful number, since it uses less digits than its factorization.

28275705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33101 (or 33098 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 28275705 is about 5317.4904795401. The cubic root of 28275705 is about 304.6523136487.

The spelling of 28275705 in words is "twenty-eight million, two hundred seventy-five thousand, seven hundred five".