1989304338 has 64 divisors (see below), whose sum is σ = 4691957760. Its totient is φ = 550454400.

The previous prime is 1989304327. The next prime is 1989304363. The reversal of 1989304338 is 8334039891.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235203 + ... + 243513.

It is an arithmetic number, because the mean of its divisors is an integer number (73311840).

Almost surely, 2^1989304338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989304338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2345978880).

1989304338 is an abundant number, since it is smaller than the sum of its proper divisors (2702653422).

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

1989304338 is a wasteful number, since it uses less digits than its factorization.

1989304338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8503.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 1989304338 is about 44601.6181096606. The cubic root of 1989304338 is about 1257.6710860240.

The spelling of 1989304338 in words is "one billion, nine hundred eighty-nine million, three hundred four thousand, three hundred thirty-eight".