27855538 has 8 divisors (see below), whose sum is σ = 42014700. Its totient is φ = 13850640.

The previous prime is 27855533. The next prime is 27855557. The reversal of 27855538 is 83555872.

It can be written as a sum of positive squares in 2 ways, for example, as 26183689 + 1671849 = 5117^2 + 1293^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 27855494 and 27855503.

It is not an unprimeable number, because it can be changed into a prime (27855533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38113 + ... + 38836.

Almost surely, 2^27855538 is an apocalyptic number.

27855538 is a deficient number, since it is larger than the sum of its proper divisors (14159162).

27855538 is a wasteful number, since it uses less digits than its factorization.

27855538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77132.

The product of its digits is 336000, while the sum is 43.

The square root of 27855538 is about 5277.8345938462. The cubic root of 27855538 is about 303.1357682503.

It can be divided in two parts, 2785553 and 8, that added together give a square (2785561 = 1669²).

The spelling of 27855538 in words is "twenty-seven million, eight hundred fifty-five thousand, five hundred thirty-eight".