19428198438 has 32 divisors (see below), whose sum is σ = 42526915200. Its totient is φ = 5868149760.

The previous prime is 19428198409. The next prime is 19428198443. The reversal of 19428198438 is 83489182491.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 459163 + ... + 499686.

It is an arithmetic number, because the mean of its divisors is an integer number (1328966100).

Almost surely, 2^19428198438 is an apocalyptic number.

19428198438 is an abundant number, since it is smaller than the sum of its proper divisors (23098716762).

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

19428198438 is a wasteful number, since it uses less digits than its factorization.

19428198438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959172.

The product of its digits is 3981312, while the sum is 57.

The spelling of 19428198438 in words is "nineteen billion, four hundred twenty-eight million, one hundred ninety-eight thousand, four hundred thirty-eight".