4778728756 has 6 divisors (see below), whose sum is σ = 8362775330. Its totient is φ = 2389364376.

The previous prime is 4778728739. The next prime is 4778728783. The reversal of 4778728756 is 6578278774.

It can be written as a sum of positive squares in only one way, i.e., 4751896356 + 26832400 = 68934^2 + 5180^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4778728694 and 4778728703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597341091 + ... + 597341098.

Almost surely, 2^4778728756 is an apocalyptic number.

It is an amenable number.

4778728756 is a deficient number, since it is larger than the sum of its proper divisors (3584046574).

4778728756 is a wasteful number, since it uses less digits than its factorization.

4778728756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194682193 (or 1194682191 counting only the distinct ones).

The product of its digits is 36879360, while the sum is 61.

The square root of 4778728756 is about 69128.3498718145. The cubic root of 4778728756 is about 1684.3698543315.

The spelling of 4778728756 in words is "four billion, seven hundred seventy-eight million, seven hundred twenty-eight thousand, seven hundred fifty-six".