1989184842 has 48 divisors (see below), whose sum is σ = 4393621440. Its totient is φ = 650270016.

The previous prime is 1989184829. The next prime is 1989184867. The reversal of 1989184842 is 2484819891.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277459 + ... + 284537.

It is an arithmetic number, because the mean of its divisors is an integer number (91533780).

Almost surely, 2^1989184842 is an apocalyptic number.

1989184842 is an abundant number, since it is smaller than the sum of its proper divisors (2404436598).

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

1989184842 is a wasteful number, since it uses less digits than its factorization.

1989184842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387 (or 7384 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The square root of 1989184842 is about 44600.2784968883. The cubic root of 1989184842 is about 1257.6459030710.

The spelling of 1989184842 in words is "one billion, nine hundred eighty-nine million, one hundred eighty-four thousand, eight hundred forty-two".