28261159 has 4 divisors (see below), whose sum is σ = 28417480. Its totient is φ = 28104840.

The previous prime is 28261141. The next prime is 28261169. The reversal of 28261159 is 95116282.

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 28261159 - 2¹⁵ = 28228391 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 (28261169) 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, 77889 + ... + 78250.

It is an arithmetic number, because the mean of its divisors is an integer number (7104370).

Almost surely, 2^28261159 is an apocalyptic number.

28261159 is a deficient number, since it is larger than the sum of its proper divisors (156321).

28261159 is a wasteful number, since it uses less digits than its factorization.

28261159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156320.

The product of its digits is 8640, while the sum is 34.

The square root of 28261159 is about 5316.1225531396. The cubic root of 28261159 is about 304.6000634611.

The spelling of 28261159 in words is "twenty-eight million, two hundred sixty-one thousand, one hundred fifty-nine".