2189041380 has 72 divisors (see below), whose sum is σ = 7030695672. Its totient is φ = 549405696.

The previous prime is 2189041321. The next prime is 2189041381. The reversal of 2189041380 is 831409812.

It can be written as a sum of positive squares in 4 ways, for example, as 243172836 + 1945868544 = 15594^2 + 44112^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2189041381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354627 + ... + 360746.

It is an arithmetic number, because the mean of its divisors is an integer number (97648551).

Almost surely, 2^2189041380 is an apocalyptic number.

2189041380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2189041380 is an abundant number, since it is smaller than the sum of its proper divisors (4841654292).

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

2189041380 is a wasteful number, since it uses less digits than its factorization.

2189041380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715405 (or 715400 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2189041380 is about 46787.1924782841. The cubic root of 2189041380 is about 1298.4283531745.

The spelling of 2189041380 in words is "two billion, one hundred eighty-nine million, forty-one thousand, three hundred eighty".