1989742560228 has 72 divisors (see below), whose sum is σ = 5147713771200. Its totient is φ = 647682348096.

The previous prime is 1989742560199. The next prime is 1989742560229. The reversal of 1989742560228 is 8220652479891.

1989742560228 is a `hidden beast` number, since 1 + 9 + 8 + 9 + 7 + 42 + 560 + 2 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (1989742560229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7105738 + ... + 7380446.

It is an arithmetic number, because the mean of its divisors is an integer number (71496024600).

Almost surely, 2^{1989742560228} is an apocalyptic number.

1989742560228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1989742560228 is an abundant number, since it is smaller than the sum of its proper divisors (3157971210972).

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

1989742560228 is a wasteful number, since it uses less digits than its factorization.

1989742560228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279441 (or 279436 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 1989742560228 in words is "one trillion, nine hundred eighty-nine billion, seven hundred forty-two million, five hundred sixty thousand, two hundred twenty-eight".