71129944 has 8 divisors (see below), whose sum is σ = 133368660. Its totient is φ = 35564968.

The previous prime is 71129917. The next prime is 71130013. The reversal of 71129944 is 44992117.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4445614 + ... + 4445629.

Almost surely, 2^71129944 is an apocalyptic number.

It is an amenable number.

71129944 is a deficient number, since it is larger than the sum of its proper divisors (62238716).

71129944 is a wasteful number, since it uses less digits than its factorization.

71129944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8891249 (or 8891245 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 71129944 is about 8433.8570061390. The cubic root of 71129944 is about 414.3342380851.

The spelling of 71129944 in words is "seventy-one million, one hundred twenty-nine thousand, nine hundred forty-four".