27836861 has 4 divisors (see below), whose sum is σ = 29978172. Its totient is φ = 25695552.

The previous prime is 27836833. The next prime is 27836863. The reversal of 27836861 is 16863872.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3728761 + 24108100 = 1931^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 27836861 - 2¹⁰ = 27835837 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 (27836863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070636 + ... + 1070661.

It is an arithmetic number, because the mean of its divisors is an integer number (7494543).

Almost surely, 2^27836861 is an apocalyptic number.

It is an amenable number.

27836861 is a deficient number, since it is larger than the sum of its proper divisors (2141311).

27836861 is a wasteful number, since it uses less digits than its factorization.

27836861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141310.

The product of its digits is 96768, while the sum is 41.

The square root of 27836861 is about 5276.0649162041. The cubic root of 27836861 is about 303.0680027598.

The spelling of 27836861 in words is "twenty-seven million, eight hundred thirty-six thousand, eight hundred sixty-one".