2189959380 has 288 divisors, whose sum is σ = 8463087360. Its totient is φ = 446238720.

The previous prime is 2189959337. The next prime is 2189959391. The reversal of 2189959380 is 839599812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 404290 + ... + 409670.

It is an arithmetic number, because the mean of its divisors is an integer number (29385720).

Almost surely, 2^2189959380 is an apocalyptic number.

2189959380 is a gapful number since it is divisible by the number (20) 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 2189959380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4231543680).

2189959380 is an abundant number, since it is smaller than the sum of its proper divisors (6273127980).

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

2189959380 is a wasteful number, since it uses less digits than its factorization.

2189959380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439 (or 5434 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 2189959380 is about 46797.0018270402. The cubic root of 2189959380 is about 1298.6098314930.

The spelling of 2189959380 in words is "two billion, one hundred eighty-nine million, nine hundred fifty-nine thousand, three hundred eighty".