2189457280 has 64 divisors (see below), whose sum is σ = 5272588080. Its totient is φ = 869355520.

The previous prime is 2189457247. The next prime is 2189457293. The reversal of 2189457280 is 827549812.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 2189457280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75195 + ... + 100165.

Almost surely, 2^2189457280 is an apocalyptic number.

2189457280 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 2189457280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2636294040).

2189457280 is an abundant number, since it is smaller than the sum of its proper divisors (3083130800).

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

2189457280 is a wasteful number, since it uses less digits than its factorization.

2189457280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25127 (or 25115 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 2189457280 is about 46791.6368595928. The cubic root of 2189457280 is about 1298.5105782314.

The spelling of 2189457280 in words is "two billion, one hundred eighty-nine million, four hundred fifty-seven thousand, two hundred eighty".