27883861 has 4 divisors (see below), whose sum is σ = 28016224. Its totient is φ = 27751500.

The previous prime is 27883853. The next prime is 27883871. The reversal of 27883861 is 16838872.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27883861 - 2³ = 27883853 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 (27883871) 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, 65865 + ... + 66286.

It is an arithmetic number, because the mean of its divisors is an integer number (7004056).

Almost surely, 2^27883861 is an apocalyptic number.

It is an amenable number.

27883861 is a deficient number, since it is larger than the sum of its proper divisors (132363).

27883861 is a wasteful number, since it uses less digits than its factorization.

27883861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132362.

The product of its digits is 129024, while the sum is 43.

The square root of 27883861 is about 5280.5171148288. The cubic root of 27883861 is about 303.2384744109.

The spelling of 27883861 in words is "twenty-seven million, eight hundred eighty-three thousand, eight hundred sixty-one".