27880636 has 12 divisors (see below), whose sum is σ = 55761328. Its totient is φ = 11948832.

The previous prime is 27880621. The next prime is 27880639. The reversal of 27880636 is 63608872.

It is a happy number.

27880636 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27880639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497841 + ... + 497896.

Almost surely, 2^27880636 is an apocalyptic number.

It is an amenable number.

27880636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27880636 is a wasteful number, since it uses less digits than its factorization.

27880636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995748 (or 995746 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 27880636 is about 5280.2117381787. The cubic root of 27880636 is about 303.2267832779.

The spelling of 27880636 in words is "twenty-seven million, eight hundred eighty thousand, six hundred thirty-six".