271991286 has 48 divisors (see below), whose sum is σ = 676020384. Its totient is φ = 77421312.

The previous prime is 271991281. The next prime is 271991287. The reversal of 271991286 is 682199172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (271991281) 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 23 ways as a sum of consecutive naturals, for example, 31006 + ... + 38798.

It is an arithmetic number, because the mean of its divisors is an integer number (14083758).

Almost surely, 2^271991286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 271991286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338010192).

271991286 is an abundant number, since it is smaller than the sum of its proper divisors (404029098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

271991286 is a wasteful number, since it uses less digits than its factorization.

271991286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8085 (or 8082 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 271991286 is about 16492.1583184252. The cubic root of 271991286 is about 647.9154410695.

The spelling of 271991286 in words is "two hundred seventy-one million, nine hundred ninety-one thousand, two hundred eighty-six".