2189393280 has 512 divisors, whose sum is σ = 8526384000. Its totient is φ = 528482304.

The previous prime is 2189393279. The next prime is 2189393303. The reversal of 2189393280 is 823939812.

2189393280 is a `hidden beast` number, since 2 + 189 + 393 + 2 + 80 = 666.

2189393280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8518912 + ... + 8519168.

Almost surely, 2^2189393280 is an apocalyptic number.

2189393280 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 2189393280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4263192000).

2189393280 is an abundant number, since it is smaller than the sum of its proper divisors (6336990720).

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

2189393280 is a wasteful number, since it uses less digits than its factorization.

2189393280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 2189393280 is about 46790.9529717017. The cubic root of 2189393280 is about 1298.4979258589.

The spelling of 2189393280 in words is "two billion, one hundred eighty-nine million, three hundred ninety-three thousand, two hundred eighty".