71130636 has 90 divisors (see below), whose sum is σ = 192252060. Its totient is φ = 22926240.

The previous prime is 71130551. The next prime is 71130671. The reversal of 71130636 is 63603117.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 29 ways as a sum of consecutive naturals, for example, 1166046 + ... + 1166106.

It is an arithmetic number, because the mean of its divisors is an integer number (2136134).

Almost surely, 2^71130636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71130636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96126030).

71130636 is an abundant number, since it is smaller than the sum of its proper divisors (121121424).

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

71130636 is a wasteful number, since it uses less digits than its factorization.

71130636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 71130636 is about 8433.8980311597. The cubic root of 71130636 is about 414.3355817216.

The spelling of 71130636 in words is "seventy-one million, one hundred thirty thousand, six hundred thirty-six".