71216084 has 18 divisors (see below), whose sum is σ = 127607130. Its totient is φ = 34776336.

The previous prime is 71216071. The next prime is 71216107. The reversal of 71216084 is 48061217.

It can be written as a sum of positive squares in only one way, i.e., 71031184 + 184900 = 8428^2 + 430^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2582 + ... + 12210.

It is an arithmetic number, because the mean of its divisors is an integer number (7089285).

Almost surely, 2^71216084 is an apocalyptic number.

It is an amenable number.

71216084 is a deficient number, since it is larger than the sum of its proper divisors (56391046).

71216084 is a wasteful number, since it uses less digits than its factorization.

71216084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9719 (or 9674 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 71216084 is about 8438.9622584770. The cubic root of 71216084 is about 414.5014267144.

The spelling of 71216084 in words is "seventy-one million, two hundred sixteen thousand, eighty-four".