27740761 has 4 divisors (see below), whose sum is σ = 28015524. Its totient is φ = 27466000.

The previous prime is 27740743. The next prime is 27740773. The reversal of 27740761 is 16704772.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22705225 + 5035536 = 4765^2 + 2244^2 .

It is a cyclic number.

It is not a de Polignac number, because 27740761 - 2⁵ = 27740729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27740701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137230 + ... + 137431.

It is an arithmetic number, because the mean of its divisors is an integer number (7003881).

Almost surely, 2^27740761 is an apocalyptic number.

It is an amenable number.

27740761 is a deficient number, since it is larger than the sum of its proper divisors (274763).

27740761 is a wasteful number, since it uses less digits than its factorization.

27740761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274762.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 27740761 is about 5266.9498763516. The cubic root of 27740761 is about 302.7188444386.

The spelling of 27740761 in words is "twenty-seven million, seven hundred forty thousand, seven hundred sixty-one".