71135856 has 60 divisors (see below), whose sum is σ = 217184760. Its totient is φ = 21555840.

The previous prime is 71135851. The next prime is 71135879. The reversal of 71135856 is 65853117.

71135856 is a `hidden beast` number, since 71 + 1 + 3 + 585 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71135856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71135851) 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 11 ways as a sum of consecutive naturals, for example, 20871 + ... + 24038.

It is an arithmetic number, because the mean of its divisors is an integer number (3619746).

Almost surely, 2^71135856 is an apocalyptic number.

It is an amenable number.

71135856 is an abundant number, since it is smaller than the sum of its proper divisors (146048904).

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

71135856 is a wasteful number, since it uses less digits than its factorization.

71135856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44934 (or 44925 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 71135856 is about 8434.2074909265. The cubic root of 71135856 is about 414.3457169645.

The spelling of 71135856 in words is "seventy-one million, one hundred thirty-five thousand, eight hundred fifty-six".