27856157 has 6 divisors (see below), whose sum is σ = 32404158. Its totient is φ = 23876664.

The previous prime is 27856139. The next prime is 27856163. The reversal of 27856157 is 75165872.

It can be written as a sum of positive squares in only one way, i.e., 24492601 + 3363556 = 4949^2 + 1834^2 .

It is not a de Polignac number, because 27856157 - 2¹⁰ = 27855133 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 (27856117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 284198 + ... + 284295.

It is an arithmetic number, because the mean of its divisors is an integer number (5400693).

Almost surely, 2^27856157 is an apocalyptic number.

It is an amenable number.

27856157 is a deficient number, since it is larger than the sum of its proper divisors (4548001).

27856157 is an equidigital number, since it uses as much as digits as its factorization.

27856157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568507 (or 568500 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 27856157 is about 5277.8932349944. The cubic root of 27856157 is about 303.1380136405.

The spelling of 27856157 in words is "twenty-seven million, eight hundred fifty-six thousand, one hundred fifty-seven".