71319944 has 8 divisors (see below), whose sum is σ = 133724910. Its totient is φ = 35659968.

The previous prime is 71319943. The next prime is 71319949. The reversal of 71319944 is 44991317.

It can be written as a sum of positive squares in only one way, i.e., 66748900 + 4571044 = 8170^2 + 2138^2 .

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

It is a super-3 number, since 3×71319944³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71319898 and 71319907.

It is not an unprimeable number, because it can be changed into a prime (71319943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4457489 + ... + 4457504.

Almost surely, 2^71319944 is an apocalyptic number.

It is an amenable number.

71319944 is a deficient number, since it is larger than the sum of its proper divisors (62404966).

71319944 is a wasteful number, since it uses less digits than its factorization.

71319944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8914999 (or 8914995 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 71319944 is about 8445.1136167609. The cubic root of 71319944 is about 414.7028288177.

The spelling of 71319944 in words is "seventy-one million, three hundred nineteen thousand, nine hundred forty-four".