71808816 has 40 divisors (see below), whose sum is σ = 196420464. Its totient is φ = 22528000.

The previous prime is 71808811. The next prime is 71808827. The reversal of 71808816 is 61880817.

It is not an unprimeable number, because it can be changed into a prime (71808811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43185 + ... + 44816.

Almost surely, 2^71808816 is an apocalyptic number.

It is an amenable number.

71808816 is an abundant number, since it is smaller than the sum of its proper divisors (124611648).

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

71808816 is a wasteful number, since it uses less digits than its factorization.

71808816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88029 (or 88023 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 39.

The square root of 71808816 is about 8474.0082605577. The cubic root of 71808816 is about 415.6482171514.

The spelling of 71808816 in words is "seventy-one million, eight hundred eight thousand, eight hundred sixteen".