27642369 has 4 divisors (see below), whose sum is σ = 36856496. Its totient is φ = 18428244.

The previous prime is 27642317. The next prime is 27642383. The reversal of 27642369 is 96324672.

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 27642369 - 2²³ = 19253761 is a prime.

It is a super-2 number, since 2×27642369² = 1528201127864322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27642869) 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, 4607059 + ... + 4607064.

It is an arithmetic number, because the mean of its divisors is an integer number (9214124).

Almost surely, 2^27642369 is an apocalyptic number.

It is an amenable number.

27642369 is a deficient number, since it is larger than the sum of its proper divisors (9214127).

27642369 is an equidigital number, since it uses as much as digits as its factorization.

27642369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9214126.

The product of its digits is 108864, while the sum is 39.

The square root of 27642369 is about 5257.6010689287. The cubic root of 27642369 is about 302.3605221798.

The spelling of 27642369 in words is "twenty-seven million, six hundred forty-two thousand, three hundred sixty-nine".