71070080 has 64 divisors (see below), whose sum is σ = 170931600. Its totient is φ = 28256256.

The previous prime is 71070079. The next prime is 71070091. The reversal of 71070080 is 8007017.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187331 + ... + 187709.

Almost surely, 2^71070080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71070080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85465800).

71070080 is an abundant number, since it is smaller than the sum of its proper divisors (99861520).

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

71070080 is a wasteful number, since it uses less digits than its factorization.

71070080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 71070080 is about 8430.3072304632. The cubic root of 71070080 is about 414.2179688785.

Adding to 71070080 its reverse (8007017), we get a palindrome (79077097).

The spelling of 71070080 in words is "seventy-one million, seventy thousand, eighty".