27981883 has 4 divisors (see below), whose sum is σ = 27993208. Its totient is φ = 27970560.

The previous prime is 27981853. The next prime is 27981901. The reversal of 27981883 is 38818972.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27981883 - 2¹³ = 27973691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27981853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198 + ... + 7483.

It is an arithmetic number, because the mean of its divisors is an integer number (6998302).

Almost surely, 2^27981883 is an apocalyptic number.

27981883 is a deficient number, since it is larger than the sum of its proper divisors (11325).

27981883 is an equidigital number, since it uses as much as digits as its factorization.

27981883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11324.

The product of its digits is 193536, while the sum is 46.

The square root of 27981883 is about 5289.7904495358. The cubic root of 27981883 is about 303.5933903400.

The spelling of 27981883 in words is "twenty-seven million, nine hundred eighty-one thousand, eight hundred eighty-three".