28265159 has 4 divisors (see below), whose sum is σ = 30439416. Its totient is φ = 26090904.

The previous prime is 28265093. The next prime is 28265177. The reversal of 28265159 is 95156282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28265159 - 2¹⁶ = 28199623 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 (28265959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087109 + ... + 1087134.

It is an arithmetic number, because the mean of its divisors is an integer number (7609854).

Almost surely, 2^28265159 is an apocalyptic number.

28265159 is a deficient number, since it is larger than the sum of its proper divisors (2174257).

28265159 is a wasteful number, since it uses less digits than its factorization.

28265159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174256.

The product of its digits is 43200, while the sum is 38.

The square root of 28265159 is about 5316.4987538793. The cubic root of 28265159 is about 304.6144335108.

The spelling of 28265159 in words is "twenty-eight million, two hundred sixty-five thousand, one hundred fifty-nine".