27863149 has 8 divisors (see below), whose sum is σ = 28740600. Its totient is φ = 26995200.

The previous prime is 27863137. The next prime is 27863191. The reversal of 27863149 is 94136872.

It can be written as a sum of positive squares in 4 ways, for example, as 1010025 + 26853124 = 1005^2 + 5182^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27863149 - 2⁷ = 27863021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27864149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3829 + ... + 8389.

It is an arithmetic number, because the mean of its divisors is an integer number (3592575).

Almost surely, 2^27863149 is an apocalyptic number.

It is an amenable number.

27863149 is a deficient number, since it is larger than the sum of its proper divisors (877451).

27863149 is a wasteful number, since it uses less digits than its factorization.

27863149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751.

The product of its digits is 72576, while the sum is 40.

The square root of 27863149 is about 5278.5555789439. Note that the first 4 decimals coincide. The cubic root of 27863149 is about 303.1633744452.

The spelling of 27863149 in words is "twenty-seven million, eight hundred sixty-three thousand, one hundred forty-nine".