27980186 has 32 divisors (see below), whose sum is σ = 47900160. Its totient is φ = 12164544.

The previous prime is 27980153. The next prime is 27980201. The reversal of 27980186 is 68108972.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31991 + ... + 32853.

It is an arithmetic number, because the mean of its divisors is an integer number (1496880).

Almost surely, 2^27980186 is an apocalyptic number.

27980186 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

27980186 is a deficient number, since it is larger than the sum of its proper divisors (19919974).

27980186 is a wasteful number, since it uses less digits than its factorization.

27980186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 27980186 is about 5289.6300437743. The cubic root of 27980186 is about 303.5872529355.

The spelling of 27980186 in words is "twenty-seven million, nine hundred eighty thousand, one hundred eighty-six".