27285381 has 12 divisors (see below), whose sum is σ = 39556140. Its totient is φ = 18123840.

The previous prime is 27285373. The next prime is 27285389. The reversal of 27285381 is 18358272.

27285381 is a `hidden beast` number, since 272 + 8 + 5 + 381 = 666.

It is an interprime number because it is at equal distance from previous prime (27285373) and next prime (27285389).

It can be written as a sum of positive squares in 2 ways, for example, as 15444900 + 11840481 = 3930^2 + 3441^2 .

It is not a de Polignac number, because 27285381 - 2³ = 27285373 is a prime.

It is a super-2 number, since 2×27285381² = 1488984032630322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27285389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2866 + ... + 7923.

It is an arithmetic number, because the mean of its divisors is an integer number (3296345).

Almost surely, 2^27285381 is an apocalyptic number.

It is an amenable number.

27285381 is a deficient number, since it is larger than the sum of its proper divisors (12270759).

27285381 is a wasteful number, since it uses less digits than its factorization.

27285381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11076 (or 11073 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 27285381 is about 5223.5410403289. The cubic root of 27285381 is about 301.0532644524.

The spelling of 27285381 in words is "twenty-seven million, two hundred eighty-five thousand, three hundred eighty-one".