71330812 has 12 divisors (see below), whose sum is σ = 142661680. Its totient is φ = 30570336.

The previous prime is 71330803. The next prime is 71330849. The reversal of 71330812 is 21803317.

71330812 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273737 + ... + 1273792.

Almost surely, 2^71330812 is an apocalyptic number.

It is an amenable number.

71330812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71330812 is a wasteful number, since it uses less digits than its factorization.

71330812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547540 (or 2547538 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 71330812 is about 8445.7570412604. The cubic root of 71330812 is about 414.7238924043.

The spelling of 71330812 in words is "seventy-one million, three hundred thirty thousand, eight hundred twelve".