19996028 has 48 divisors (see below), whose sum is σ = 39414816. Its totient is φ = 8816640.

The previous prime is 19996019. The next prime is 19996049. The reversal of 19996028 is 82069991.

It is a super-2 number, since 2×19996028² = 799682271553568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19996028.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 176900 + ... + 177012.

It is an arithmetic number, because the mean of its divisors is an integer number (821142).

Almost surely, 2^19996028 is an apocalyptic number.

It is an amenable number.

19996028 is a deficient number, since it is larger than the sum of its proper divisors (19418788).

19996028 is a wasteful number, since it uses less digits than its factorization.

19996028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 19996028 is about 4471.6918498483. The cubic root of 19996028 is about 271.4237910252.

The spelling of 19996028 in words is "nineteen million, nine hundred ninety-six thousand, twenty-eight".