71540736 has 112 divisors (see below), whose sum is σ = 198168768. Its totient is φ = 22937600.

The previous prime is 71540723. The next prime is 71540759. The reversal of 71540736 is 63704517.

It is a junction number, because it is equal to n+sod(n) for n = 71540697 and 71540706.

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, 1007581 + ... + 1007651.

It is an arithmetic number, because the mean of its divisors is an integer number (1769364).

Almost surely, 2^71540736 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 71540736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99084384).

71540736 is an abundant number, since it is smaller than the sum of its proper divisors (126628032).

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

71540736 is an equidigital number, since it uses as much as digits as its factorization.

71540736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 71540736 is about 8458.1756898282. The cubic root of 71540736 is about 415.1303330901.

The spelling of 71540736 in words is "seventy-one million, five hundred forty thousand, seven hundred thirty-six".