4991443928 has 16 divisors (see below), whose sum is σ = 9361112280. Its totient is φ = 2495147328.

The previous prime is 4991443907. The next prime is 4991443931. The reversal of 4991443928 is 8293441994.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 4991443928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33725 + ... + 105452.

Almost surely, 2^4991443928 is an apocalyptic number.

It is an amenable number.

4991443928 is a deficient number, since it is larger than the sum of its proper divisors (4369668352).

4991443928 is a wasteful number, since it uses less digits than its factorization.

4991443928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143666 (or 143662 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 53.

The square root of 4991443928 is about 70650.1516488111. The cubic root of 4991443928 is about 1709.0000112987. Note that the first 4 decimals are identical.

The spelling of 4991443928 in words is "four billion, nine hundred ninety-one million, four hundred forty-three thousand, nine hundred twenty-eight".