27866261 has 4 divisors (see below), whose sum is σ = 27882624. Its totient is φ = 27849900.

The previous prime is 27866239. The next prime is 27866263. The reversal of 27866261 is 16266872.

It is a happy number.

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 27866261 - 2⁶ = 27866197 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 (27866263) 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, 5285 + ... + 9146.

It is an arithmetic number, because the mean of its divisors is an integer number (6970656).

Almost surely, 2^27866261 is an apocalyptic number.

It is an amenable number.

27866261 is a deficient number, since it is larger than the sum of its proper divisors (16363).

27866261 is a wasteful number, since it uses less digits than its factorization.

27866261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16362.

The product of its digits is 48384, while the sum is 38.

The square root of 27866261 is about 5278.8503483240. The cubic root of 27866261 is about 303.1746606702.

The spelling of 27866261 in words is "twenty-seven million, eight hundred sixty-six thousand, two hundred sixty-one".