71371844 has 6 divisors (see below), whose sum is σ = 124900734. Its totient is φ = 35685920.

The previous prime is 71371843. The next prime is 71371849. The reversal of 71371844 is 44817317.

It can be written as a sum of positive squares in only one way, i.e., 69522244 + 1849600 = 8338^2 + 1360^2 .

It is not an unprimeable number, because it can be changed into a prime (71371843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8921477 + ... + 8921484.

It is an arithmetic number, because the mean of its divisors is an integer number (20816789).

Almost surely, 2^71371844 is an apocalyptic number.

It is an amenable number.

71371844 is a deficient number, since it is larger than the sum of its proper divisors (53528890).

71371844 is a wasteful number, since it uses less digits than its factorization.

71371844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17842965 (or 17842963 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 71371844 is about 8448.1858407589. The cubic root of 71371844 is about 414.8033984335.

The spelling of 71371844 in words is "seventy-one million, three hundred seventy-one thousand, eight hundred forty-four".