28165287 has 8 divisors (see below), whose sum is σ = 37745136. Its totient is φ = 18681152.

The previous prime is 28165279. The next prime is 28165307. The reversal of 28165287 is 78256182.

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 28165287 - 2³ = 28165279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28165217) 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, 23238 + ... + 24419.

It is an arithmetic number, because the mean of its divisors is an integer number (4718142).

Almost surely, 2^28165287 is an apocalyptic number.

28165287 is a deficient number, since it is larger than the sum of its proper divisors (9579849).

28165287 is a wasteful number, since it uses less digits than its factorization.

28165287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47857.

The product of its digits is 53760, while the sum is 39.

The square root of 28165287 is about 5307.0977944636. The cubic root of 28165287 is about 304.2552356407.

The spelling of 28165287 in words is "twenty-eight million, one hundred sixty-five thousand, two hundred eighty-seven".