71930520 has 48 divisors (see below), whose sum is σ = 233775360. Its totient is φ = 19181376.

The previous prime is 71930513. The next prime is 71930531. The reversal of 71930520 is 2503917.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99544 + ... + 100263.

It is an arithmetic number, because the mean of its divisors is an integer number (4870320).

Almost surely, 2^71930520 is an apocalyptic number.

It is an amenable number.

71930520 is an abundant number, since it is smaller than the sum of its proper divisors (161844840).

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

71930520 is a wasteful number, since it uses less digits than its factorization.

71930520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199824 (or 199817 counting only the distinct ones).

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

The square root of 71930520 is about 8481.1862377854. The cubic root of 71930520 is about 415.8829028163.

The spelling of 71930520 in words is "seventy-one million, nine hundred thirty thousand, five hundred twenty".