27771842 has 16 divisors (see below), whose sum is σ = 48771072. Its totient is φ = 11611680.

The previous prime is 27771839. The next prime is 27771853. The reversal of 27771842 is 24817772.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27771796 and 27771805.

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 in 7 ways as a sum of consecutive naturals, for example, 23618 + ... + 24765.

It is an arithmetic number, because the mean of its divisors is an integer number (3048192).

Almost surely, 2^27771842 is an apocalyptic number.

27771842 is a deficient number, since it is larger than the sum of its proper divisors (20999230).

27771842 is a wasteful number, since it uses less digits than its factorization.

27771842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48433.

The product of its digits is 43904, while the sum is 38.

The square root of 27771842 is about 5269.8996195374. The cubic root of 27771842 is about 302.8318585539.

The spelling of 27771842 in words is "twenty-seven million, seven hundred seventy-one thousand, eight hundred forty-two".