19988272 has 20 divisors (see below), whose sum is σ = 38847960. Its totient is φ = 9963008.

The previous prime is 19988257. The next prime is 19988291. The reversal of 19988272 is 27288991.

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, 3879 + ... + 7417.

It is an arithmetic number, because the mean of its divisors is an integer number (1942398).

Almost surely, 2^19988272 is an apocalyptic number.

It is an amenable number.

19988272 is a deficient number, since it is larger than the sum of its proper divisors (18859688).

19988272 is a wasteful number, since it uses less digits than its factorization.

19988272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900 (or 3894 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 19988272 is about 4470.8245324548. The cubic root of 19988272 is about 271.3886934687.

The spelling of 19988272 in words is "nineteen million, nine hundred eighty-eight thousand, two hundred seventy-two".