71083845 has 128 divisors (see below), whose sum is σ = 157593600. Its totient is φ = 29673216.

The previous prime is 71083841. The next prime is 71083847. The reversal of 71083845 is 54838017.

It is not a de Polignac number, because 71083845 - 2² = 71083841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71083841) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 664282 + ... + 664388.

It is an arithmetic number, because the mean of its divisors is an integer number (1231200).

Almost surely, 2^71083845 is an apocalyptic number.

It is an amenable number.

71083845 is an abundant number, since it is smaller than the sum of its proper divisors (86509755).

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

71083845 is a wasteful number, since it uses less digits than its factorization.

71083845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 71083845 is about 8431.1235906017. The cubic root of 71083845 is about 414.2447093496.

The spelling of 71083845 in words is "seventy-one million, eighty-three thousand, eight hundred forty-five".