71727272 has 16 divisors (see below), whose sum is σ = 136110240. Its totient is φ = 35431216.

The previous prime is 71727251. The next prime is 71727289. The reversal of 71727272 is 27272717.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53348 + ... + 54675.

It is an arithmetic number, because the mean of its divisors is an integer number (8506890).

Almost surely, 2^71727272 is an apocalyptic number.

It is an amenable number.

71727272 is a deficient number, since it is larger than the sum of its proper divisors (64382968).

71727272 is a wasteful number, since it uses less digits than its factorization.

71727272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108112 (or 108108 counting only the distinct ones).

The product of its digits is 19208, while the sum is 35.

The square root of 71727272 is about 8469.1954753684. The cubic root of 71727272 is about 415.4908248898.

Adding to 71727272 its reverse (27272717), we get a palindrome (98999989).

The spelling of 71727272 in words is "seventy-one million, seven hundred twenty-seven thousand, two hundred seventy-two".