71320128 has 56 divisors (see below), whose sum is σ = 205861920. Its totient is φ = 21611520.

The previous prime is 71320111. The next prime is 71320141. The reversal of 71320128 is 82102317.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 71320098 and 71320107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14773 + ... + 18996.

Almost surely, 2^71320128 is an apocalyptic number.

It is an amenable number.

71320128 is an abundant number, since it is smaller than the sum of its proper divisors (134541792).

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

71320128 is a wasteful number, since it uses less digits than its factorization.

71320128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33795 (or 33785 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 71320128 is about 8445.1245106274. The cubic root of 71320128 is about 414.7031854513.

The spelling of 71320128 in words is "seventy-one million, three hundred twenty thousand, one hundred twenty-eight".