19872028 has 12 divisors (see below), whose sum is σ = 37937592. Its totient is φ = 9032720.

The previous prime is 19872019. The next prime is 19872037. The reversal of 19872028 is 82027891.

It is an interprime number because it is at equal distance from previous prime (19872019) and next prime (19872037).

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 3 ways as a sum of consecutive naturals, for example, 225775 + ... + 225862.

It is an arithmetic number, because the mean of its divisors is an integer number (3161466).

Almost surely, 2^19872028 is an apocalyptic number.

It is an amenable number.

19872028 is a deficient number, since it is larger than the sum of its proper divisors (18065564).

19872028 is a wasteful number, since it uses less digits than its factorization.

19872028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451652 (or 451650 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 19872028 is about 4457.8052896016. The cubic root of 19872028 is about 270.8615733446.

The spelling of 19872028 in words is "nineteen million, eight hundred seventy-two thousand, twenty-eight".