27840285 has 36 divisors (see below), whose sum is σ = 53052636. Its totient is φ = 13495680.

The previous prime is 27840257. The next prime is 27840287. The reversal of 27840285 is 58204872.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3663396 + 24176889 = 1914^2 + 4917^2 .

It is not a de Polignac number, because 27840285 - 2¹⁰ = 27839261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27840287) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2889 + ... + 8001.

Almost surely, 2^27840285 is an apocalyptic number.

It is an amenable number.

27840285 is a deficient number, since it is larger than the sum of its proper divisors (25212351).

27840285 is a wasteful number, since it uses less digits than its factorization.

27840285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146 (or 5132 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 27840285 is about 5276.3893904829. The cubic root of 27840285 is about 303.0804282784.

The spelling of 27840285 in words is "twenty-seven million, eight hundred forty thousand, two hundred eighty-five".