71131944 has 64 divisors (see below), whose sum is σ = 202789440. Its totient is φ = 20597760.

The previous prime is 71131937. The next prime is 71131969. The reversal of 71131944 is 44913117.

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, 1402 + ... + 12009.

It is an arithmetic number, because the mean of its divisors is an integer number (3168585).

Almost surely, 2^71131944 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 71131944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101394720).

71131944 is an abundant number, since it is smaller than the sum of its proper divisors (131657496).

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

71131944 is a wasteful number, since it uses less digits than its factorization.

71131944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13450 (or 13446 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 71131944 is about 8433.9755750180. The cubic root of 71131944 is about 414.3381214037.

The spelling of 71131944 in words is "seventy-one million, one hundred thirty-one thousand, nine hundred forty-four".