27968818 has 16 divisors (see below), whose sum is σ = 44576280. Its totient is φ = 13136256.

The previous prime is 27968813. The next prime is 27968821. The reversal of 27968818 is 81886972.

It can be written as a sum of positive squares in 4 ways, for example, as 27741289 + 227529 = 5267^2 + 477^2 .

It is not an unprimeable number, because it can be changed into a prime (27968813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4371 + ... + 8662.

Almost surely, 2^27968818 is an apocalyptic number.

27968818 is a deficient number, since it is larger than the sum of its proper divisors (16607462).

27968818 is a wasteful number, since it uses less digits than its factorization.

27968818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13101.

The product of its digits is 387072, while the sum is 49.

The square root of 27968818 is about 5288.5553793073. Note that the first 3 decimals coincide. The cubic root of 27968818 is about 303.5461327968.

The spelling of 27968818 in words is "twenty-seven million, nine hundred sixty-eight thousand, eight hundred eighteen".