2189805216 has 48 divisors (see below), whose sum is σ = 5751230688. Its totient is φ = 729555200.

The previous prime is 2189805209. The next prime is 2189805221. The reversal of 2189805216 is 6125089812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226726 + ... + 236186.

It is an arithmetic number, because the mean of its divisors is an integer number (119817306).

Almost surely, 2^2189805216 is an apocalyptic number.

It is an amenable number.

2189805216 is an abundant number, since it is smaller than the sum of its proper divisors (3561425472).

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

2189805216 is a wasteful number, since it uses less digits than its factorization.

2189805216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11885 (or 11877 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 2189805216 is about 46795.3546412462. The cubic root of 2189805216 is about 1298.5793585406.

The spelling of 2189805216 in words is "two billion, one hundred eighty-nine million, eight hundred five thousand, two hundred sixteen".