27286812 has 144 divisors (see below), whose sum is σ = 85612800. Its totient is φ = 7153920.

The previous prime is 27286807. The next prime is 27286813. The reversal of 27286812 is 21868272.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27286813) 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 47 ways as a sum of consecutive naturals, for example, 196239 + ... + 196377.

Almost surely, 2^27286812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27286812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42806400).

27286812 is an abundant number, since it is smaller than the sum of its proper divisors (58325988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27286812 is a wasteful number, since it uses less digits than its factorization.

27286812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 211 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 27286812 is about 5223.6780145794. The cubic root of 27286812 is about 301.0585273401.

The spelling of 27286812 in words is "twenty-seven million, two hundred eighty-six thousand, eight hundred twelve".