27649989 has 24 divisors (see below), whose sum is σ = 41993952. Its totient is φ = 17508960.

The previous prime is 27649987. The next prime is 27650003. The reversal of 27649989 is 98994672.

27649989 is a `hidden beast` number, since 2 + 76 + 499 + 89 = 666.

It is not a de Polignac number, because 27649989 - 2¹ = 27649987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27649981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13354 + ... + 15284.

It is an arithmetic number, because the mean of its divisors is an integer number (1749748).

Almost surely, 2^27649989 is an apocalyptic number.

It is an amenable number.

27649989 is a deficient number, since it is larger than the sum of its proper divisors (14343963).

27649989 is a wasteful number, since it uses less digits than its factorization.

27649989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017 (or 2014 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 27649989 is about 5258.3256840937. The cubic root of 27649989 is about 302.3883029090.

The spelling of 27649989 in words is "twenty-seven million, six hundred forty-nine thousand, nine hundred eighty-nine".