71891934 has 32 divisors (see below), whose sum is σ = 152160000. Its totient is φ = 22581504.

The previous prime is 71891927. The next prime is 71891947. The reversal of 71891934 is 43919817.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21102 + ... + 24270.

It is an arithmetic number, because the mean of its divisors is an integer number (4755000).

Almost surely, 2^71891934 is an apocalyptic number.

71891934 is an abundant number, since it is smaller than the sum of its proper divisors (80268066).

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

71891934 is a wasteful number, since it uses less digits than its factorization.

71891934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392.

The product of its digits is 54432, while the sum is 42.

The square root of 71891934 is about 8478.9111329227. The cubic root of 71891934 is about 415.8085248936.

The spelling of 71891934 in words is "seventy-one million, eight hundred ninety-one thousand, nine hundred thirty-four".