71002080 has 72 divisors (see below), whose sum is σ = 242299512. Its totient is φ = 18933504.

The previous prime is 71002079. The next prime is 71002093. The reversal of 71002080 is 8020017.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23214 + ... + 26093.

It is an arithmetic number, because the mean of its divisors is an integer number (3365271).

Almost surely, 2^71002080 is an apocalyptic number.

It is an amenable number.

71002080 is an abundant number, since it is smaller than the sum of its proper divisors (171297432).

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

71002080 is a wasteful number, since it uses less digits than its factorization.

71002080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49328 (or 49317 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 71002080 is about 8426.2731975649. The cubic root of 71002080 is about 414.0858185183.

Adding to 71002080 its reverse (8020017), we get a palindrome (79022097).

It can be divided in two parts, 7100 and 2080, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 71002080 in words is "seventy-one million, two thousand, eighty".