19728996 has 24 divisors (see below), whose sum is σ = 52610880. Its totient is φ = 5636832.

The previous prime is 19728979. The next prime is 19729001. The reversal of 19728996 is 69982791.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117351 + ... + 117518.

It is an arithmetic number, because the mean of its divisors is an integer number (2192120).

Almost surely, 2^19728996 is an apocalyptic number.

It is an amenable number.

19728996 is an abundant number, since it is smaller than the sum of its proper divisors (32881884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19728996 is a wasteful number, since it uses less digits than its factorization.

19728996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234883 (or 234881 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 19728996 is about 4441.7334454017. The cubic root of 19728996 is about 270.2101518886.

The spelling of 19728996 in words is "nineteen million, seven hundred twenty-eight thousand, nine hundred ninety-six".