71065944 has 32 divisors (see below), whose sum is σ = 197406000. Its totient is φ = 23688576.

The previous prime is 71065931. The next prime is 71065949. The reversal of 71065944 is 44956017.

It is a super-2 number, since 2×71065944² = 10100736793222272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 71065899 and 71065908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71065949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164289 + ... + 164720.

Almost surely, 2^71065944 is an apocalyptic number.

It is an amenable number.

71065944 is an abundant number, since it is smaller than the sum of its proper divisors (126340056).

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

71065944 is a wasteful number, since it uses less digits than its factorization.

71065944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329024 (or 329014 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 71065944 is about 8430.0619214808. The cubic root of 71065944 is about 414.2099334354.

The spelling of 71065944 in words is "seventy-one million, sixty-five thousand, nine hundred forty-four".