1996556728 has 16 divisors (see below), whose sum is σ = 3757361760. Its totient is φ = 994593600.

The previous prime is 1996556719. The next prime is 1996556747. The reversal of 1996556728 is 8276556991.

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 3 ways as a sum of consecutive naturals, for example, 458293 + ... + 462628.

It is an arithmetic number, because the mean of its divisors is an integer number (234835110).

Almost surely, 2^1996556728 is an apocalyptic number.

It is an amenable number.

1996556728 is a deficient number, since it is larger than the sum of its proper divisors (1760805032).

1996556728 is a wasteful number, since it uses less digits than its factorization.

1996556728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921198 (or 921194 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 58.

The square root of 1996556728 is about 44682.8460149977. The cubic root of 1996556728 is about 1259.1975927471.

The spelling of 1996556728 in words is "one billion, nine hundred ninety-six million, five hundred fifty-six thousand, seven hundred twenty-eight".