71728888 has 32 divisors (see below), whose sum is σ = 167679360. Its totient is φ = 27946080.

The previous prime is 71728879. The next prime is 71728913. The reversal of 71728888 is 88882717.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57606 + ... + 58837.

It is an arithmetic number, because the mean of its divisors is an integer number (5239980).

Almost surely, 2^71728888 is an apocalyptic number.

It is an amenable number.

71728888 is an abundant number, since it is smaller than the sum of its proper divisors (95950472).

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

71728888 is a wasteful number, since it uses less digits than its factorization.

71728888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116467 (or 116463 counting only the distinct ones).

The product of its digits is 401408, while the sum is 49.

The square root of 71728888 is about 8469.2908794066. The cubic root of 71728888 is about 415.4939451727.

It can be divided in two parts, 7172 and 8888, that multiplied together give a palindrome (63744736).

The spelling of 71728888 in words is "seventy-one million, seven hundred twenty-eight thousand, eight hundred eighty-eight".