27897705 has 24 divisors (see below), whose sum is σ = 52752960. Its totient is φ = 13525920.

The previous prime is 27897691. The next prime is 27897707. The reversal of 27897705 is 50779872.

It is not a de Polignac number, because 27897705 - 2⁷ = 27897577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (27897707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27685 + ... + 28674.

It is an arithmetic number, because the mean of its divisors is an integer number (2198040).

Almost surely, 2^27897705 is an apocalyptic number.

It is an amenable number.

27897705 is a deficient number, since it is larger than the sum of its proper divisors (24855255).

27897705 is a wasteful number, since it uses less digits than its factorization.

27897705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56381 (or 56378 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 27897705 is about 5281.8278086284. The cubic root of 27897705 is about 303.2886508537.

The spelling of 27897705 in words is "twenty-seven million, eight hundred ninety-seven thousand, seven hundred five".