71093520 has 120 divisors (see below), whose sum is σ = 240281496. Its totient is φ = 18837504.

The previous prime is 71093501. The next prime is 71093521. The reversal of 71093520 is 2539017.

It can be written as a sum of positive squares in 4 ways, for example, as 15023376 + 56070144 = 3876^2 + 7488^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (71093521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210792 + ... + 211128.

Almost surely, 2^71093520 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 71093520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120140748).

71093520 is an abundant number, since it is smaller than the sum of its proper divisors (169187976).

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

71093520 is a wasteful number, since it uses less digits than its factorization.

71093520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 71093520 is about 8431.6973380216. The cubic root of 71093520 is about 414.2635023480.

The spelling of 71093520 in words is "seventy-one million, ninety-three thousand, five hundred twenty".