71947320 has 32 divisors (see below), whose sum is σ = 215842320. Its totient is φ = 19185920.

The previous prime is 71947313. The next prime is 71947321. The reversal of 71947320 is 2374917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71947321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299661 + ... + 299900.

Almost surely, 2^71947320 is an apocalyptic number.

It is an amenable number.

71947320 is an abundant number, since it is smaller than the sum of its proper divisors (143895000).

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

71947320 is a wasteful number, since it uses less digits than its factorization.

71947320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599575 (or 599571 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 71947320 is about 8482.1766074517. The cubic root of 71947320 is about 415.9152779884.

The spelling of 71947320 in words is "seventy-one million, nine hundred forty-seven thousand, three hundred twenty".