71003728 has 10 divisors (see below), whose sum is σ = 137569754. Its totient is φ = 35501856.

The previous prime is 71003693. The next prime is 71003749. The reversal of 71003728 is 82730017.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61591104 + 9412624 = 7848^2 + 3068^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71003696 and 71003705.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2218851 + ... + 2218882.

Almost surely, 2^71003728 is an apocalyptic number.

It is an amenable number.

71003728 is a deficient number, since it is larger than the sum of its proper divisors (66566026).

71003728 is a wasteful number, since it uses less digits than its factorization.

71003728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437741 (or 4437735 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 71003728 is about 8426.3709863737. The cubic root of 71003728 is about 414.0890222185.

The spelling of 71003728 in words is "seventy-one million, three thousand, seven hundred twenty-eight".