19028917728 has 72 divisors (see below), whose sum is σ = 54145295568. Its totient is φ = 6339244032.

The previous prime is 19028917723. The next prime is 19028917759. The reversal of 19028917728 is 82771982091.

19028917728 is a `hidden beast` number, since 190 + 289 + 177 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19028917723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 494976 + ... + 532032.

It is an arithmetic number, because the mean of its divisors is an integer number (752017994).

Almost surely, 2^19028917728 is an apocalyptic number.

19028917728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19028917728 is an abundant number, since it is smaller than the sum of its proper divisors (35116377840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19028917728 is a wasteful number, since it uses less digits than its factorization.

19028917728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38856 (or 38845 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 19028917728 in words is "nineteen billion, twenty-eight million, nine hundred seventeen thousand, seven hundred twenty-eight".