1889000000 has 98 divisors (see below), whose sum is σ = 4688025930. Its totient is φ = 755200000.

The previous prime is 1888999997. The next prime is 1889000027. The reversal of 1889000000 is 9881.

It can be written as a sum of positive squares in 7 ways, for example, as 1885643776 + 3356224 = 43424^2 + 1832^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 999056 + ... + 1000944.

Almost surely, 2^1889000000 is an apocalyptic number.

1889000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1889000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2344012965).

1889000000 is an abundant number, since it is smaller than the sum of its proper divisors (2799025930).

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

1889000000 is an frugal number, since it uses more digits than its factorization.

1889000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931 (or 1896 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1889000000 is about 43462.6276242015. The cubic root of 1889000000 is about 1236.1674940499.

Adding to 1889000000 its reverse (9881), we get a palindrome (1889009881).

The spelling of 1889000000 in words is "one billion, eight hundred eighty-nine million", and thus it is an aban number.