27986029 has 4 divisors (see below), whose sum is σ = 29632284. Its totient is φ = 26339776.

The previous prime is 27986011. The next prime is 27986033. The reversal of 27986029 is 92068972.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9753129 + 18232900 = 3123^2 + 4270^2 .

It is a cyclic number.

It is not a de Polignac number, because 27986029 - 2¹¹ = 27983981 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 (27986059) 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, 823102 + ... + 823135.

It is an arithmetic number, because the mean of its divisors is an integer number (7408071).

Almost surely, 2^27986029 is an apocalyptic number.

It is an amenable number.

27986029 is a deficient number, since it is larger than the sum of its proper divisors (1646255).

27986029 is a wasteful number, since it uses less digits than its factorization.

27986029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646254.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 27986029 is about 5290.1823219999. The cubic root of 27986029 is about 303.6083838036.

The spelling of 27986029 in words is "twenty-seven million, nine hundred eighty-six thousand, twenty-nine".