71744728 has 32 divisors (see below), whose sum is σ = 153135360. Its totient is φ = 31192480.

The previous prime is 71744707. The next prime is 71744737. The reversal of 71744728 is 82744717.

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 in 7 ways as a sum of consecutive naturals, for example, 15700 + ... + 19747.

It is an arithmetic number, because the mean of its divisors is an integer number (4785480).

Almost surely, 2^71744728 is an apocalyptic number.

It is an amenable number.

71744728 is an abundant number, since it is smaller than the sum of its proper divisors (81390632).

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

71744728 is a wasteful number, since it uses less digits than its factorization.

71744728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35487 (or 35483 counting only the distinct ones).

The product of its digits is 87808, while the sum is 40.

The square root of 71744728 is about 8470.2259710116. The cubic root of 71744728 is about 415.5245276427.

It can be divided in two parts, 7174472 and 8, that multiplied together give a square (57395776 = 7576²).

The spelling of 71744728 in words is "seventy-one million, seven hundred forty-four thousand, seven hundred twenty-eight".