71118140 has 96 divisors (see below), whose sum is σ = 169646400. Its totient is φ = 24883200.

The previous prime is 71118137. The next prime is 71118161. The reversal of 71118140 is 4181117.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 652406 + ... + 652514.

It is an arithmetic number, because the mean of its divisors is an integer number (1767150).

Almost surely, 2^71118140 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 71118140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84823200).

71118140 is an abundant number, since it is smaller than the sum of its proper divisors (98528260).

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

71118140 is a wasteful number, since it uses less digits than its factorization.

71118140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 71118140 is about 8433.1571786609. The cubic root of 71118140 is about 414.3113172558.

Adding to 71118140 its reverse (4181117), we get a palindrome (75299257).

It can be divided in two parts, 7111 and 8140, that added together give a palindrome (15251).

The spelling of 71118140 in words is "seventy-one million, one hundred eighteen thousand, one hundred forty".