71044320 has 96 divisors (see below), whose sum is σ = 225009792. Its totient is φ = 18842112.

The previous prime is 71044297. The next prime is 71044331. The reversal of 71044320 is 2344017.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135579 + ... + 136101.

It is an arithmetic number, because the mean of its divisors is an integer number (2343852).

Almost surely, 2^71044320 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 71044320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112504896).

71044320 is an abundant number, since it is smaller than the sum of its proper divisors (153965472).

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

71044320 is a wasteful number, since it uses less digits than its factorization.

71044320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 71044320 is about 8428.7792710451. The cubic root of 71044320 is about 414.1679171346.

Adding to 71044320 its reverse (2344017), we get a palindrome (73388337).

The spelling of 71044320 in words is "seventy-one million, forty-four thousand, three hundred twenty".