27842143 has 6 divisors (see below), whose sum is σ = 32387856. Its totient is φ = 23864652.

The previous prime is 27842081. The next prime is 27842147. The reversal of 27842143 is 34124872.

It is a de Polignac number, because none of the positive numbers 2^k-27842143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27842147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 284055 + ... + 284152.

It is an arithmetic number, because the mean of its divisors is an integer number (5397976).

Almost surely, 2^27842143 is an apocalyptic number.

27842143 is a deficient number, since it is larger than the sum of its proper divisors (4545713).

27842143 is an equidigital number, since it uses as much as digits as its factorization.

27842143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568221 (or 568214 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 27842143 is about 5276.5654549148. The cubic root of 27842143 is about 303.0871704377.

The spelling of 27842143 in words is "twenty-seven million, eight hundred forty-two thousand, one hundred forty-three".