28136341 has 4 divisors (see below), whose sum is σ = 28157184. Its totient is φ = 28115500.

The previous prime is 28136323. The next prime is 28136357. The reversal of 28136341 is 14363182.

It is the 2166-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28136341 - 2¹⁷ = 28005269 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 (28137341) 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, 8245 + ... + 11146.

It is an arithmetic number, because the mean of its divisors is an integer number (7039296).

Almost surely, 2^28136341 is an apocalyptic number.

It is an amenable number.

28136341 is a deficient number, since it is larger than the sum of its proper divisors (20843).

28136341 is a wasteful number, since it uses less digits than its factorization.

28136341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20842.

The product of its digits is 3456, while the sum is 28.

The square root of 28136341 is about 5304.3699908660. The cubic root of 28136341 is about 304.1509702874.

The spelling of 28136341 in words is "twenty-eight million, one hundred thirty-six thousand, three hundred forty-one".