27285557 has 6 divisors (see below), whose sum is σ = 29546082. Its totient is φ = 25186512.

The previous prime is 27285551. The next prime is 27285563. The reversal of 27285557 is 75558272.

It is an interprime number because it is at equal distance from previous prime (27285551) and next prime (27285563).

It can be written as a sum of positive squares in 3 ways, for example, as 1540081 + 25745476 = 1241^2 + 5074^2 .

It is not a de Polignac number, because 27285557 - 2²⁰ = 26236981 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 (27285551) 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, 80558 + ... + 80895.

It is an arithmetic number, because the mean of its divisors is an integer number (4924347).

Almost surely, 2^27285557 is an apocalyptic number.

It is an amenable number.

27285557 is a deficient number, since it is larger than the sum of its proper divisors (2260525).

27285557 is a wasteful number, since it uses less digits than its factorization.

27285557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161479 (or 161466 counting only the distinct ones).

The product of its digits is 196000, while the sum is 41.

The square root of 27285557 is about 5223.5578871110. The cubic root of 27285557 is about 301.0539117497.

The spelling of 27285557 in words is "twenty-seven million, two hundred eighty-five thousand, five hundred fifty-seven".