2189078528 has 156 divisors (see below), whose sum is σ = 5490591120. Its totient is φ = 864976896.

The previous prime is 2189078527. The next prime is 2189078537. The reversal of 2189078528 is 8258709812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2189078527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2608733 + ... + 2609571.

Almost surely, 2^2189078528 is an apocalyptic number.

2189078528 is a gapful number since it is divisible by the number (28) 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 2189078528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2745295560).

2189078528 is an abundant number, since it is smaller than the sum of its proper divisors (3301512592).

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

2189078528 is an equidigital number, since it uses as much as digits as its factorization.

2189078528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 2189078528 is about 46787.5894655837. The cubic root of 2189078528 is about 1298.4356979029.

The spelling of 2189078528 in words is "two billion, one hundred eighty-nine million, seventy-eight thousand, five hundred twenty-eight".