71345728 has 28 divisors (see below), whose sum is σ = 142240000. Its totient is φ = 35505792.

The previous prime is 71345723. The next prime is 71345777. The reversal of 71345728 is 82754317.

It is a super-3 number, since 3×71345728³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (71345723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11773 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (5080000).

Almost surely, 2^71345728 is an apocalyptic number.

It is an amenable number.

71345728 is a deficient number, since it is larger than the sum of its proper divisors (70894272).

71345728 is a wasteful number, since it uses less digits than its factorization.

71345728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234 (or 5224 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 71345728 is about 8446.6400420522. The cubic root of 71345728 is about 414.7527980542.

The spelling of 71345728 in words is "seventy-one million, three hundred forty-five thousand, seven hundred twenty-eight".