27788897 has 8 divisors (see below), whose sum is σ = 29484936. Its totient is φ = 26099712.

The previous prime is 27788881. The next prime is 27788923. The reversal of 27788897 is 79888772.

It can be written as a sum of positive squares in 4 ways, for example, as 15335056 + 12453841 = 3916^2 + 3529^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27788897 - 2⁴ = 27788881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27788197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8393 + ... + 11225.

It is an arithmetic number, because the mean of its divisors is an integer number (3685617).

Almost surely, 2^27788897 is an apocalyptic number.

It is an amenable number.

27788897 is a deficient number, since it is larger than the sum of its proper divisors (1696039).

27788897 is a wasteful number, since it uses less digits than its factorization.

27788897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427.

The product of its digits is 3161088, while the sum is 56.

The square root of 27788897 is about 5271.5175234462. The cubic root of 27788897 is about 302.8938366833.

The spelling of 27788897 in words is "twenty-seven million, seven hundred eighty-eight thousand, eight hundred ninety-seven".