71080072 has 16 divisors (see below), whose sum is σ = 152314560. Its totient is φ = 30462864.

The previous prime is 71080069. The next prime is 71080081. The reversal of 71080072 is 27008017.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634588 + ... + 634699.

It is an arithmetic number, because the mean of its divisors is an integer number (9519660).

Almost surely, 2^71080072 is an apocalyptic number.

It is an amenable number.

71080072 is an abundant number, since it is smaller than the sum of its proper divisors (81234488).

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

71080072 is a wasteful number, since it uses less digits than its factorization.

71080072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269300 (or 1269296 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 71080072 is about 8430.8998333511. The cubic root of 71080072 is about 414.2373801037.

Adding to 71080072 its reverse (27008017), we get a palindrome (98088089).

The spelling of 71080072 in words is "seventy-one million, eighty thousand, seventy-two".