19004444728 has 16 divisors (see below), whose sum is σ = 35642639880. Its totient is φ = 9499740768.

The previous prime is 19004444713. The next prime is 19004444729. The reversal of 19004444728 is 82744440091.

It is a happy number.

It is a super-2 number, since 2×19004444728² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19004444729) by changing a digit.

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, 277450 + ... + 339097.

Almost surely, 2^19004444728 is an apocalyptic number.

It is an amenable number.

19004444728 is a deficient number, since it is larger than the sum of its proper divisors (16638195152).

19004444728 is a wasteful number, since it uses less digits than its factorization.

19004444728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620406 (or 620402 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 19004444728 in words is "nineteen billion, four million, four hundred forty-four thousand, seven hundred twenty-eight".