71397936 has 100 divisors (see below), whose sum is σ = 209305800. Its totient is φ = 23493888.

The previous prime is 71397899. The next prime is 71397959. The reversal of 71397936 is 63979317.

It is a junction number, because it is equal to n+sod(n) for n = 71397891 and 71397900.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 115035 + ... + 115653.

It is an arithmetic number, because the mean of its divisors is an integer number (2093058).

Almost surely, 2^71397936 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 71397936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104652900).

71397936 is an abundant number, since it is smaller than the sum of its proper divisors (137907864).

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

71397936 is a wasteful number, since it uses less digits than its factorization.

71397936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 713 counting only the distinct ones).

The product of its digits is 214326, while the sum is 45.

The square root of 71397936 is about 8449.7299365128. The cubic root of 71397936 is about 414.8539399872.

The spelling of 71397936 in words is "seventy-one million, three hundred ninety-seven thousand, nine hundred thirty-six".