71271288 has 48 divisors (see below), whose sum is σ = 210576600. Its totient is φ = 21597120.

The previous prime is 71271283. The next prime is 71271301. The reversal of 71271288 is 88217217.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71271283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44203 + ... + 45786.

Almost surely, 2^71271288 is an apocalyptic number.

It is an amenable number.

71271288 is an abundant number, since it is smaller than the sum of its proper divisors (139305312).

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

71271288 is a wasteful number, since it uses less digits than its factorization.

71271288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90012 (or 90005 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 71271288 is about 8442.2324061826. The cubic root of 71271288 is about 414.6085009668.

The spelling of 71271288 in words is "seventy-one million, two hundred seventy-one thousand, two hundred eighty-eight".