2189643802 has 16 divisors (see below), whose sum is σ = 3417645312. Its totient is φ = 1051307920.

The previous prime is 2189643793. The next prime is 2189643851. The reversal of 2189643802 is 2083469812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214774 + ... + 224737.

It is an arithmetic number, because the mean of its divisors is an integer number (213602832).

Almost surely, 2^2189643802 is an apocalyptic number.

2189643802 is a deficient number, since it is larger than the sum of its proper divisors (1228001510).

2189643802 is a wasteful number, since it uses less digits than its factorization.

2189643802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439613.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 2189643802 is about 46793.6299297244. The cubic root of 2189643802 is about 1298.5474509783.

The spelling of 2189643802 in words is "two billion, one hundred eighty-nine million, six hundred forty-three thousand, eight hundred two".