27730161 has 16 divisors (see below), whose sum is σ = 41697600. Its totient is φ = 18209664.

The previous prime is 27730159. The next prime is 27730163. The reversal of 27730161 is 16103772.

It is an interprime number because it is at equal distance from previous prime (27730159) and next prime (27730163).

It is not a de Polignac number, because 27730161 - 2¹ = 27730159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (27730163) 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, 5856 + ... + 9473.

It is an arithmetic number, because the mean of its divisors is an integer number (2606100).

Almost surely, 2^27730161 is an apocalyptic number.

It is an amenable number.

27730161 is a deficient number, since it is larger than the sum of its proper divisors (13967439).

27730161 is a wasteful number, since it uses less digits than its factorization.

27730161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15405 (or 15399 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 27730161 is about 5265.9435052040. The cubic root of 27730161 is about 302.6802823080.

The spelling of 27730161 in words is "twenty-seven million, seven hundred thirty thousand, one hundred sixty-one".