71043380 has 24 divisors (see below), whose sum is σ = 149359560. Its totient is φ = 28385280.

The previous prime is 71043377. The next prime is 71043397. The reversal of 71043380 is 8334017.

It can be written as a sum of positive squares in 4 ways, for example, as 5400976 + 65642404 = 2324^2 + 8102^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25076 + ... + 27764.

It is an arithmetic number, because the mean of its divisors is an integer number (6223315).

Almost surely, 2^71043380 is an apocalyptic number.

It is an amenable number.

71043380 is an abundant number, since it is smaller than the sum of its proper divisors (78316180).

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

71043380 is a wasteful number, since it uses less digits than its factorization.

71043380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019 (or 4017 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 71043380 is about 8428.7235095238. The cubic root of 71043380 is about 414.1660904835.

Adding to 71043380 its reverse (8334017), we get a palindrome (79377397).

The spelling of 71043380 in words is "seventy-one million, forty-three thousand, three hundred eighty".