27742861 has 16 divisors (see below), whose sum is σ = 30855168. Its totient is φ = 24825600.

The previous prime is 27742843. The next prime is 27742867. The reversal of 27742861 is 16824772.

It is a cyclic number.

It is not a de Polignac number, because 27742861 - 2⁵ = 27742829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27742861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27742867) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31716 + ... + 32578.

It is an arithmetic number, because the mean of its divisors is an integer number (1928448).

Almost surely, 2^27742861 is an apocalyptic number.

It is an amenable number.

27742861 is a deficient number, since it is larger than the sum of its proper divisors (3112307).

27742861 is a wasteful number, since it uses less digits than its factorization.

27742861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its digits is 37632, while the sum is 37.

The square root of 27742861 is about 5267.1492289473. The cubic root of 27742861 is about 302.7264829401.

The spelling of 27742861 in words is "twenty-seven million, seven hundred forty-two thousand, eight hundred sixty-one".