2189355904 has 32 divisors (see below), whose sum is σ = 4502312640. Its totient is φ = 1059363840.

The previous prime is 2189355887. The next prime is 2189355911. The reversal of 2189355904 is 4095539812.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271909 + ... + 279844.

It is an arithmetic number, because the mean of its divisors is an integer number (140697270).

Almost surely, 2^2189355904 is an apocalyptic number.

It is an amenable number.

2189355904 is an abundant number, since it is smaller than the sum of its proper divisors (2312956736).

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

2189355904 is an equidigital number, since it uses as much as digits as its factorization.

2189355904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551798 (or 551786 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 2189355904 is about 46790.5535765500. The cubic root of 2189355904 is about 1298.4905367594.

The spelling of 2189355904 in words is "two billion, one hundred eighty-nine million, three hundred fifty-five thousand, nine hundred four".