27881606 has 4 divisors (see below), whose sum is σ = 41822412. Its totient is φ = 13940802.

The previous prime is 27881591. The next prime is 27881611. The reversal of 27881606 is 60618872.

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

It is a self number, because there is not a number n which added to its sum of digits gives 27881606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6970400 + ... + 6970403.

It is an arithmetic number, because the mean of its divisors is an integer number (10455603).

Almost surely, 2^27881606 is an apocalyptic number.

27881606 is a deficient number, since it is larger than the sum of its proper divisors (13940806).

27881606 is a wasteful number, since it uses less digits than its factorization.

27881606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13940805.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 27881606 is about 5280.3035897569. The cubic root of 27881606 is about 303.2302997755.

It can be divided in two parts, 2788 and 1606, that multiplied together give a triangular number (4477528 = T₂₉₉₂).

The spelling of 27881606 in words is "twenty-seven million, eight hundred eighty-one thousand, six hundred six".