71040650 has 24 divisors (see below), whose sum is σ = 132467340. Its totient is φ = 28344960.

The previous prime is 71040589. The next prime is 71040653. The reversal of 71040650 is 5604017.

It can be written as a sum of positive squares in 6 ways, for example, as 27573001 + 43467649 = 5251^2 + 6593^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71040653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21296 + ... + 24404.

Almost surely, 2^71040650 is an apocalyptic number.

71040650 is a deficient number, since it is larger than the sum of its proper divisors (61426690).

71040650 is a wasteful number, since it uses less digits than its factorization.

71040650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578 (or 3573 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 71040650 is about 8428.5615617376. The cubic root of 71040650 is about 414.1607853310.

Adding to 71040650 its reverse (5604017), we get a palindrome (76644667).

The spelling of 71040650 in words is "seventy-one million, forty thousand, six hundred fifty".