27331389 has 12 divisors (see below), whose sum is σ = 39551616. Its totient is φ = 18187272.

The previous prime is 27331373. The next prime is 27331397. The reversal of 27331389 is 98313372.

It is a happy number.

27331389 is a `hidden beast` number, since 273 + 3 + 1 + 389 = 666.

It is not a de Polignac number, because 27331389 - 2⁴ = 27331373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27331349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2962 + ... + 7964.

It is an arithmetic number, because the mean of its divisors is an integer number (3295968).

Almost surely, 2^27331389 is an apocalyptic number.

It is an amenable number.

27331389 is a deficient number, since it is larger than the sum of its proper divisors (12220227).

27331389 is a wasteful number, since it uses less digits than its factorization.

27331389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616 (or 5613 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 27331389 is about 5227.9430945641. The cubic root of 27331389 is about 301.2223791989. Note that the first 3 decimals are identical.

The spelling of 27331389 in words is "twenty-seven million, three hundred thirty-one thousand, three hundred eighty-nine".