27840369 has 4 divisors (see below), whose sum is σ = 37120496. Its totient is φ = 18560244.

The previous prime is 27840367. The next prime is 27840413. The reversal of 27840369 is 96304872.

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 not a de Polignac number, because 27840369 - 2¹ = 27840367 is a prime.

It is a super-2 number, since 2×27840369² = 1550172292112322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27840361) 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, 4640059 + ... + 4640064.

It is an arithmetic number, because the mean of its divisors is an integer number (9280124).

Almost surely, 2^27840369 is an apocalyptic number.

It is an amenable number.

27840369 is a deficient number, since it is larger than the sum of its proper divisors (9280127).

27840369 is an equidigital number, since it uses as much as digits as its factorization.

27840369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280126.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 27840369 is about 5276.3973504656. The cubic root of 27840369 is about 303.0807330972.

The spelling of 27840369 in words is "twenty-seven million, eight hundred forty thousand, three hundred sixty-nine".