71885320 has 32 divisors (see below), whose sum is σ = 174184920. Its totient is φ = 26542080.

The previous prime is 71885291. The next prime is 71885323. The reversal of 71885320 is 2358817.

It can be written as a sum of positive squares in 4 ways, for example, as 26646244 + 45239076 = 5162^2 + 6726^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (71885323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68601 + ... + 69640.

Almost surely, 2^71885320 is an apocalyptic number.

It is an amenable number.

71885320 is an abundant number, since it is smaller than the sum of its proper divisors (102299600).

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

71885320 is a wasteful number, since it uses less digits than its factorization.

71885320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138265 (or 138261 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 71885320 is about 8478.5210974556. The cubic root of 71885320 is about 415.7957731528.

The spelling of 71885320 in words is "seventy-one million, eight hundred eighty-five thousand, three hundred twenty".