27920871 has 18 divisors (see below), whose sum is σ = 44331560. Its totient is φ = 16921080.

The previous prime is 27920857. The next prime is 27920887. The reversal of 27920871 is 17802972.

It is not a de Polignac number, because 27920871 - 2⁶ = 27920807 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 (27920071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11731 + ... + 13908.

Almost surely, 2^27920871 is an apocalyptic number.

27920871 is a deficient number, since it is larger than the sum of its proper divisors (16410689).

27920871 is a wasteful number, since it uses less digits than its factorization.

27920871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25667 (or 25653 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 27920871 is about 5284.0203443969. The cubic root of 27920871 is about 303.3725770048.

The spelling of 27920871 in words is "twenty-seven million, nine hundred twenty thousand, eight hundred seventy-one".