28275917 has 8 divisors (see below), whose sum is σ = 28742400. Its totient is φ = 27812304.

The previous prime is 28275889. The next prime is 28275931. The reversal of 28275917 is 71957282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28275917 - 2⁶ = 28275853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28275967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27863 + ... + 28859.

It is an arithmetic number, because the mean of its divisors is an integer number (3592800).

Almost surely, 2^28275917 is an apocalyptic number.

It is an amenable number.

28275917 is a deficient number, since it is larger than the sum of its proper divisors (466483).

28275917 is an equidigital number, since it uses as much as digits as its factorization.

28275917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435.

The product of its digits is 70560, while the sum is 41.

The square root of 28275917 is about 5317.5104137181. The cubic root of 28275917 is about 304.6530750342.

It can be divided in two parts, 28275 and 917, that added together give a palindrome (29192).

The spelling of 28275917 in words is "twenty-eight million, two hundred seventy-five thousand, nine hundred seventeen".