27618993 has 6 divisors (see below), whose sum is σ = 39894114. Its totient is φ = 18412656.

The previous prime is 27618979. The next prime is 27619043. The reversal of 27618993 is 39981672.

27618993 is a `hidden beast` number, since 27 + 618 + 9 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14311089 + 13307904 = 3783^2 + 3648^2 .

It is not a de Polignac number, because 27618993 - 2¹⁴ = 27602609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27618593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1534380 + ... + 1534397.

It is an arithmetic number, because the mean of its divisors is an integer number (6649019).

Almost surely, 2^27618993 is an apocalyptic number.

It is an amenable number.

27618993 is a deficient number, since it is larger than the sum of its proper divisors (12275121).

27618993 is a wasteful number, since it uses less digits than its factorization.

27618993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068783 (or 3068780 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 27618993 is about 5255.3775316337. The cubic root of 27618993 is about 302.2752669102.

The spelling of 27618993 in words is "twenty-seven million, six hundred eighteen thousand, nine hundred ninety-three".