71891592 has 64 divisors (see below), whose sum is σ = 194347200. Its totient is φ = 22083840.

The previous prime is 71891587. The next prime is 71891683. The reversal of 71891592 is 29519817.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14742 + ... + 19002.

It is an arithmetic number, because the mean of its divisors is an integer number (3036675).

Almost surely, 2^71891592 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 71891592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97173600).

71891592 is an abundant number, since it is smaller than the sum of its proper divisors (122455608).

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

71891592 is a wasteful number, since it uses less digits than its factorization.

71891592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326 (or 4322 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 71891592 is about 8478.8909652147. The cubic root of 71891592 is about 415.8078655394.

The spelling of 71891592 in words is "seventy-one million, eight hundred ninety-one thousand, five hundred ninety-two".