27663986 has 32 divisors (see below), whose sum is σ = 50450688. Its totient is φ = 11119680.

The previous prime is 27663973. The next prime is 27663991. The reversal of 27663986 is 68936672.

It is a super-2 number, since 2×27663986² = 1530592242816392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27663986.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16256 + ... + 17876.

It is an arithmetic number, because the mean of its divisors is an integer number (1576584).

Almost surely, 2^27663986 is an apocalyptic number.

27663986 is a deficient number, since it is larger than the sum of its proper divisors (22786702).

27663986 is a wasteful number, since it uses less digits than its factorization.

27663986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706.

The product of its digits is 653184, while the sum is 47.

The square root of 27663986 is about 5259.6564526592. The cubic root of 27663986 is about 302.4393193860.

The spelling of 27663986 in words is "twenty-seven million, six hundred sixty-three thousand, nine hundred eighty-six".