19728872 has 16 divisors (see below), whose sum is σ = 37894500. Its totient is φ = 9623680.

The previous prime is 19728853. The next prime is 19728883. The reversal of 19728872 is 27882791.

It can be written as a sum of positive squares in 2 ways, for example, as 16859236 + 2869636 = 4106^2 + 1694^2 .

It is a cake number, because a cake can be divided into 19728872 parts by 491 planar cuts.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29747 + ... + 30402.

Almost surely, 2^19728872 is an apocalyptic number.

It is an amenable number.

19728872 is a deficient number, since it is larger than the sum of its proper divisors (18165628).

19728872 is a wasteful number, since it uses less digits than its factorization.

19728872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60196 (or 60192 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 19728872 is about 4441.7194868654. The cubic root of 19728872 is about 270.2095857822.

The spelling of 19728872 in words is "nineteen million, seven hundred twenty-eight thousand, eight hundred seventy-two".