2189461220 has 12 divisors (see below), whose sum is σ = 4597868604. Its totient is φ = 875784480.

The previous prime is 2189461201. The next prime is 2189461271. The reversal of 2189461220 is 221649812.

It can be written as a sum of positive squares in 2 ways, for example, as 687278656 + 1502182564 = 26216^2 + 38758^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54736511 + ... + 54736550.

It is an arithmetic number, because the mean of its divisors is an integer number (383155717).

Almost surely, 2^2189461220 is an apocalyptic number.

2189461220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2189461220 is an abundant number, since it is smaller than the sum of its proper divisors (2408407384).

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

2189461220 is a wasteful number, since it uses less digits than its factorization.

2189461220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109473070 (or 109473068 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 2189461220 is about 46791.6789611144. The cubic root of 2189461220 is about 1298.5113571350.

The spelling of 2189461220 in words is "two billion, one hundred eighty-nine million, four hundred sixty-one thousand, two hundred twenty".