71138312 has 16 divisors (see below), whose sum is σ = 152439360. Its totient is φ = 30487824.

The previous prime is 71138303. The next prime is 71138317. The reversal of 71138312 is 21383117.

It is not an unprimeable number, because it can be changed into a prime (71138317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635108 + ... + 635219.

It is an arithmetic number, because the mean of its divisors is an integer number (9527460).

Almost surely, 2^71138312 is an apocalyptic number.

It is an amenable number.

71138312 is an abundant number, since it is smaller than the sum of its proper divisors (81301048).

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

71138312 is a wasteful number, since it uses less digits than its factorization.

71138312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270340 (or 1270336 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 71138312 is about 8434.3530872261. The cubic root of 71138312 is about 414.3504854054.

The spelling of 71138312 in words is "seventy-one million, one hundred thirty-eight thousand, three hundred twelve".