27868978 has 4 divisors (see below), whose sum is σ = 41803470. Its totient is φ = 13934488.

The previous prime is 27868963. The next prime is 27868987. The reversal of 27868978 is 87986872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25070049 + 2798929 = 5007^2 + 1673^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6967243 + ... + 6967246.

Almost surely, 2^27868978 is an apocalyptic number.

27868978 is a deficient number, since it is larger than the sum of its proper divisors (13934492).

27868978 is a wasteful number, since it uses less digits than its factorization.

27868978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13934491.

The product of its digits is 2709504, while the sum is 55.

The square root of 27868978 is about 5279.1076897521. The cubic root of 27868978 is about 303.1845136698.

The spelling of 27868978 in words is "twenty-seven million, eight hundred sixty-eight thousand, nine hundred seventy-eight".