71050640 has 20 divisors (see below), whose sum is σ = 165192924. Its totient is φ = 28420224.

The previous prime is 71050631. The next prime is 71050643. The reversal of 71050640 is 4605017.

It can be written as a sum of positive squares in 2 ways, for example, as 37503376 + 33547264 = 6124^2 + 5792^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (71050643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443987 + ... + 444146.

Almost surely, 2^71050640 is an apocalyptic number.

It is an amenable number.

71050640 is an abundant number, since it is smaller than the sum of its proper divisors (94142284).

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

71050640 is a wasteful number, since it uses less digits than its factorization.

71050640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888146 (or 888140 counting only the distinct ones).

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

The square root of 71050640 is about 8429.1541687170. The cubic root of 71050640 is about 414.1801980302.

Adding to 71050640 its reverse (4605017), we get a palindrome (75655657).

The spelling of 71050640 in words is "seventy-one million, fifty thousand, six hundred forty".