71143884 has 108 divisors (see below), whose sum is σ = 216111168. Its totient is φ = 19656000.

The previous prime is 71143823. The next prime is 71143889. The reversal of 71143884 is 48834117.

It is a super-2 number, since 2×71143884² = 10122904461210912, which contains 22 as substring.

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

Its product of digits (21504) is a multiple of the sum of its prime divisors (1344).

It is not an unprimeable number, because it can be changed into a prime (71143889) 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 35 ways as a sum of consecutive naturals, for example, 54034 + ... + 55334.

Almost surely, 2^71143884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71143884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108055584).

71143884 is an abundant number, since it is smaller than the sum of its proper divisors (144967284).

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

71143884 is a wasteful number, since it uses less digits than its factorization.

71143884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356 (or 1344 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 71143884 is about 8434.6833965479. The cubic root of 71143884 is about 414.3613033016.

It can be divided in two parts, 71143 and 884, that added together give a palindrome (72027).

The spelling of 71143884 in words is "seventy-one million, one hundred forty-three thousand, eight hundred eighty-four".