27056639 has 4 divisors (see below), whose sum is σ = 28648224. Its totient is φ = 25465056.

The previous prime is 27056621. The next prime is 27056641. The reversal of 27056639 is 93665072.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27056639 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 (27056669) 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, 795767 + ... + 795800.

It is an arithmetic number, because the mean of its divisors is an integer number (7162056).

Almost surely, 2^27056639 is an apocalyptic number.

27056639 is a deficient number, since it is larger than the sum of its proper divisors (1591585).

27056639 is a wasteful number, since it uses less digits than its factorization.

27056639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591584.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 27056639 is about 5201.5996577976. The cubic root of 27056639 is about 300.2096275609.

The spelling of 27056639 in words is "twenty-seven million, fifty-six thousand, six hundred thirty-nine".