71881288 has 8 divisors (see below), whose sum is σ = 134777430. Its totient is φ = 35940640.

The previous prime is 71881267. The next prime is 71881289. The reversal of 71881288 is 88218817.

It can be written as a sum of positive squares in only one way, i.e., 57426084 + 14455204 = 7578^2 + 3802^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (71881289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4492573 + ... + 4492588.

Almost surely, 2^71881288 is an apocalyptic number.

It is an amenable number.

71881288 is a deficient number, since it is larger than the sum of its proper divisors (62896142).

71881288 is a wasteful number, since it uses less digits than its factorization.

71881288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8985167 (or 8985163 counting only the distinct ones).

The product of its digits is 57344, while the sum is 43.

The square root of 71881288 is about 8478.2833168042. The cubic root of 71881288 is about 415.7879991042.

The spelling of 71881288 in words is "seventy-one million, eight hundred eighty-one thousand, two hundred eighty-eight".