19983728 has 30 divisors (see below), whose sum is σ = 39739272. Its totient is φ = 9735040.

The previous prime is 19983727. The next prime is 19983767. The reversal of 19983728 is 82738991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19983727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26525 + ... + 27267.

Almost surely, 2^19983728 is an apocalyptic number.

It is an amenable number.

19983728 is a deficient number, since it is larger than the sum of its proper divisors (19755544).

19983728 is an equidigital number, since it uses as much as digits as its factorization.

19983728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 786 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 19983728 is about 4470.3163199040. The cubic root of 19983728 is about 271.3681266803.

The spelling of 19983728 in words is "nineteen million, nine hundred eighty-three thousand, seven hundred twenty-eight".