2189823228 has 24 divisors (see below), whose sum is σ = 5677319760. Its totient is φ = 729941040.

The previous prime is 2189823221. The next prime is 2189823247. The reversal of 2189823228 is 8223289812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189823221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10137963 + ... + 10138178.

It is an arithmetic number, because the mean of its divisors is an integer number (236554990).

Almost surely, 2^2189823228 is an apocalyptic number.

It is an amenable number.

2189823228 is an abundant number, since it is smaller than the sum of its proper divisors (3487496532).

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

2189823228 is a wasteful number, since it uses less digits than its factorization.

2189823228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20276154 (or 20276146 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 2189823228 is about 46795.5470958509. The cubic root of 2189823228 is about 1298.5829189710.

The spelling of 2189823228 in words is "two billion, one hundred eighty-nine million, eight hundred twenty-three thousand, two hundred twenty-eight".