27864069 has 4 divisors (see below), whose sum is σ = 37152096. Its totient is φ = 18576044.

The previous prime is 27864059. The next prime is 27864077. The reversal of 27864069 is 96046872.

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 27864069 - 2⁸ = 27863813 is a prime.

It is a super-2 number, since 2×27864069² = 1552812682473522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27864069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27864059) 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, 4644009 + ... + 4644014.

It is an arithmetic number, because the mean of its divisors is an integer number (9288024).

Almost surely, 2^27864069 is an apocalyptic number.

It is an amenable number.

27864069 is a deficient number, since it is larger than the sum of its proper divisors (9288027).

27864069 is an equidigital number, since it uses as much as digits as its factorization.

27864069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9288026.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 27864069 is about 5278.6427232765. The cubic root of 27864069 is about 303.1667110774.

The spelling of 27864069 in words is "twenty-seven million, eight hundred sixty-four thousand, sixty-nine".