1989683200 has 72 divisors (see below), whose sum is σ = 4933336590. Its totient is φ = 795852800.

The previous prime is 1989683191. The next prime is 1989683203. The reversal of 1989683200 is 23869891.

It can be written as a sum of positive squares in 3 ways, for example, as 1792336896 + 197346304 = 42336^2 + 14048^2 .

It is not an unprimeable number, because it can be changed into a prime (1989683203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31770 + ... + 70630.

Almost surely, 2^1989683200 is an apocalyptic number.

1989683200 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 1989683200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2466668295).

1989683200 is an abundant number, since it is smaller than the sum of its proper divisors (2943653390).

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

1989683200 is an equidigital number, since it uses as much as digits as its factorization.

1989683200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38893 (or 38868 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1989683200 is about 44605.8650852105. The cubic root of 1989683200 is about 1257.7509218957.

The spelling of 1989683200 in words is "one billion, nine hundred eighty-nine million, six hundred eighty-three thousand, two hundred".