27966478 has 4 divisors (see below), whose sum is σ = 41949720. Its totient is φ = 13983238.

The previous prime is 27966451. The next prime is 27966493. The reversal of 27966478 is 87466972.

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

It is a congruent number.

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 as a sum of consecutive naturals, namely, 6991618 + ... + 6991621.

It is an arithmetic number, because the mean of its divisors is an integer number (10487430).

Almost surely, 2^27966478 is an apocalyptic number.

27966478 is a deficient number, since it is larger than the sum of its proper divisors (13983242).

27966478 is a wasteful number, since it uses less digits than its factorization.

27966478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13983241.

The product of its digits is 1016064, while the sum is 49.

The square root of 27966478 is about 5288.3341422418. The cubic root of 27966478 is about 303.5376672054.

The spelling of 27966478 in words is "twenty-seven million, nine hundred sixty-six thousand, four hundred seventy-eight".