2189941890 has 32 divisors (see below), whose sum is σ = 5304087360. Its totient is φ = 578625984.

The previous prime is 2189941877. The next prime is 2189941891. The reversal of 2189941890 is 981499812.

It is not an unprimeable number, because it can be changed into a prime (2189941891) 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 15 ways as a sum of consecutive naturals, for example, 331584 + ... + 338123.

It is an arithmetic number, because the mean of its divisors is an integer number (165752730).

Almost surely, 2^2189941890 is an apocalyptic number.

2189941890 is an abundant number, since it is smaller than the sum of its proper divisors (3114145470).

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

2189941890 is a wasteful number, since it uses less digits than its factorization.

2189941890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669826.

The product of its (nonzero) digits is 373248, while the sum is 51.

The square root of 2189941890 is about 46796.8149557211. The cubic root of 2189941890 is about 1298.6063743899.

The spelling of 2189941890 in words is "two billion, one hundred eighty-nine million, nine hundred forty-one thousand, eight hundred ninety".