27740261 has 4 divisors (see below), whose sum is σ = 27768000. Its totient is φ = 27712524.

The previous prime is 27740249. The next prime is 27740263. The reversal of 27740261 is 16204772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27740261 - 2¹⁰ = 27739237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27740263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12311 + ... + 14388.

It is an arithmetic number, because the mean of its divisors is an integer number (6942000).

Almost surely, 2^27740261 is an apocalyptic number.

It is an amenable number.

27740261 is a deficient number, since it is larger than the sum of its proper divisors (27739).

27740261 is a wasteful number, since it uses less digits than its factorization.

27740261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27738.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 27740261 is about 5266.9024103357. The cubic root of 27740261 is about 302.7170256909.

The spelling of 27740261 in words is "twenty-seven million, seven hundred forty thousand, two hundred sixty-one".