2189530944 has 168 divisors, whose sum is σ = 6540812928. Its totient is φ = 699632640.

The previous prime is 2189530909. The next prime is 2189530957. The reversal of 2189530944 is 4490359812.

2189530944 is a `hidden beast` number, since 21 + 8 + 9 + 530 + 94 + 4 = 666.

It is a super-2 number, since 2×2189530944² = 9588091509467062272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2189530944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1512429 + ... + 1513875.

Almost surely, 2^2189530944 is an apocalyptic number.

2189530944 is a gapful number since it is divisible by the number (24) 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 2189530944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3270406464).

2189530944 is an abundant number, since it is smaller than the sum of its proper divisors (4351281984).

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

2189530944 is a wasteful number, since it uses less digits than its factorization.

2189530944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 2189530944 is about 46792.4240021822. The cubic root of 2189530944 is about 1298.5251408068.

The spelling of 2189530944 in words is "two billion, one hundred eighty-nine million, five hundred thirty thousand, nine hundred forty-four".