71330780 has 12 divisors (see below), whose sum is σ = 149794680. Its totient is φ = 28532304.

The previous prime is 71330773. The next prime is 71330803. The reversal of 71330780 is 8703317.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1783250 + ... + 1783289.

It is an arithmetic number, because the mean of its divisors is an integer number (12482890).

Almost surely, 2^71330780 is an apocalyptic number.

It is an amenable number.

71330780 is an abundant number, since it is smaller than the sum of its proper divisors (78463900).

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

71330780 is a wasteful number, since it uses less digits than its factorization.

71330780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566548 (or 3566546 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 71330780 is about 8445.7551468178. The cubic root of 71330780 is about 414.7238303873.

The spelling of 71330780 in words is "seventy-one million, three hundred thirty thousand, seven hundred eighty".