3728787856 has 20 divisors (see below), whose sum is σ = 7250616412. Its totient is φ = 1857661056.

The previous prime is 3728787841. The next prime is 3728787889. The reversal of 3728787856 is 6587878273.

It can be written as a sum of positive squares in 2 ways, for example, as 984704400 + 2744083456 = 31380^2 + 52384^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3728787794 and 3728787803.

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 3 ways as a sum of consecutive naturals, for example, 416235 + ... + 425098.

Almost surely, 2^3728787856 is an apocalyptic number.

It is an amenable number.

3728787856 is a deficient number, since it is larger than the sum of its proper divisors (3521828556).

3728787856 is a wasteful number, since it uses less digits than its factorization.

3728787856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841618 (or 841612 counting only the distinct ones).

The product of its digits is 31610880, while the sum is 61.

The square root of 3728787856 is about 61063.8015193945. The cubic root of 3728787856 is about 1550.6813315428.

The spelling of 3728787856 in words is "three billion, seven hundred twenty-eight million, seven hundred eighty-seven thousand, eight hundred fifty-six".