71708820 has 48 divisors (see below), whose sum is σ = 201519360. Its totient is φ = 19052416.

The previous prime is 71708809. The next prime is 71708893. The reversal of 71708820 is 2880717.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15541 + ... + 19619.

It is an arithmetic number, because the mean of its divisors is an integer number (4198320).

Almost surely, 2^71708820 is an apocalyptic number.

It is an amenable number.

71708820 is an abundant number, since it is smaller than the sum of its proper divisors (129810540).

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

71708820 is a wasteful number, since it uses less digits than its factorization.

71708820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384 (or 4382 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 71708820 is about 8468.1060456279. The cubic root of 71708820 is about 415.4551931884.

The spelling of 71708820 in words is "seventy-one million, seven hundred eight thousand, eight hundred twenty".