1989849180 has 48 divisors (see below), whose sum is σ = 6078086784. Its totient is φ = 482387520.

The previous prime is 1989849179. The next prime is 1989849203. The reversal of 1989849180 is 819489891.

It is a self number, because there is not a number n which added to its sum of digits gives 1989849180.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1506802 + ... + 1508121.

It is an arithmetic number, because the mean of its divisors is an integer number (126626808).

Almost surely, 2^1989849180 is an apocalyptic number.

1989849180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1989849180 is an abundant number, since it is smaller than the sum of its proper divisors (4088237604).

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

1989849180 is a wasteful number, since it uses less digits than its factorization.

1989849180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014946 (or 3014944 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 57.

The square root of 1989849180 is about 44607.7255640769. The cubic root of 1989849180 is about 1257.7858949161.

The spelling of 1989849180 in words is "one billion, nine hundred eighty-nine million, eight hundred forty-nine thousand, one hundred eighty".