27018649 has 12 divisors (see below), whose sum is σ = 31603764. Its totient is φ = 23030784.

The previous prime is 27018647. The next prime is 27018653. The reversal of 27018649 is 94681072.

It can be written as a sum of positive squares in 2 ways, for example, as 12250000 + 14768649 = 3500^2 + 3843^2 .

It is not a de Polignac number, because 27018649 - 2¹ = 27018647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27018647) 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, 8029 + ... + 10885.

It is an arithmetic number, because the mean of its divisors is an integer number (2633647).

Almost surely, 2^27018649 is an apocalyptic number.

It is an amenable number.

27018649 is a deficient number, since it is larger than the sum of its proper divisors (4585115).

27018649 is a wasteful number, since it uses less digits than its factorization.

27018649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 27018649 is about 5197.9466138082. The cubic root of 27018649 is about 300.0690544741.

The spelling of 27018649 in words is "twenty-seven million, eighteen thousand, six hundred forty-nine".