27856983 has 48 divisors (see below), whose sum is σ = 49199360. Its totient is φ = 13685760.

The previous prime is 27856973. The next prime is 27856987. The reversal of 27856983 is 38965872.

It is not a de Polignac number, because 27856983 - 2¹⁸ = 27594839 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27856987) 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 47 ways as a sum of consecutive naturals, for example, 47991 + ... + 48567.

Almost surely, 2^27856983 is an apocalyptic number.

27856983 is a deficient number, since it is larger than the sum of its proper divisors (21342377).

27856983 is a wasteful number, since it uses less digits than its factorization.

27856983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 617 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 27856983 is about 5277.9714853341. The cubic root of 27856983 is about 303.1410098605.

Subtracting 27856983 from its reverse (38965872), we obtain a square (11108889 = 3333²).

The spelling of 27856983 in words is "twenty-seven million, eight hundred fifty-six thousand, nine hundred eighty-three".