27638897 has 16 divisors (see below), whose sum is σ = 32622912. Its totient is φ = 23085120.

The previous prime is 27638851. The next prime is 27638909. The reversal of 27638897 is 79883672.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27638897 - 2⁶ = 27638833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27638837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49343 + ... + 49899.

It is an arithmetic number, because the mean of its divisors is an integer number (2038932).

Almost surely, 2^27638897 is an apocalyptic number.

It is an amenable number.

27638897 is a deficient number, since it is larger than the sum of its proper divisors (4984015).

27638897 is a wasteful number, since it uses less digits than its factorization.

27638897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928.

The product of its digits is 1016064, while the sum is 50.

The square root of 27638897 is about 5257.2708699476. The cubic root of 27638897 is about 302.3478623907.

The spelling of 27638897 in words is "twenty-seven million, six hundred thirty-eight thousand, eight hundred ninety-seven".