71540480 has 72 divisors (see below), whose sum is σ = 186976944. Its totient is φ = 26009600.

The previous prime is 71540473. The next prime is 71540501. The reversal of 71540480 is 8404517.

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, 11540 + ... + 16620.

It is an arithmetic number, because the mean of its divisors is an integer number (2596902).

Almost surely, 2^71540480 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 71540480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93488472).

71540480 is an abundant number, since it is smaller than the sum of its proper divisors (115436464).

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

71540480 is a wasteful number, since it uses less digits than its factorization.

71540480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113 (or 5099 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 71540480 is about 8458.1605565276. The cubic root of 71540480 is about 415.1298379247.

Adding to 71540480 its reverse (8404517), we get a palindrome (79944997).

The spelling of 71540480 in words is "seventy-one million, five hundred forty thousand, four hundred eighty".