71126728 has 32 divisors (see below), whose sum is σ = 144187200. Its totient is φ = 32778432.

The previous prime is 71126723. The next prime is 71126743. The reversal of 71126728 is 82762117.

It is a happy number.

It is a super-2 number, since 2×71126728² = 10118022871971968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71126693 and 71126702.

It is not an unprimeable number, because it can be changed into a prime (71126723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700 + ... + 11947.

It is an arithmetic number, because the mean of its divisors is an integer number (4505850).

Almost surely, 2^71126728 is an apocalyptic number.

It is an amenable number.

71126728 is an abundant number, since it is smaller than the sum of its proper divisors (73060472).

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

71126728 is a wasteful number, since it uses less digits than its factorization.

71126728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12709 (or 12705 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 71126728 is about 8433.6663438863. Note that the first 3 decimals coincide. The cubic root of 71126728 is about 414.3279935561.

The spelling of 71126728 in words is "seventy-one million, one hundred twenty-six thousand, seven hundred twenty-eight".