2289691866 has 64 divisors (see below), whose sum is σ = 5787657216. Its totient is φ = 586569600.

The previous prime is 2289691841. The next prime is 2289691889. The reversal of 2289691866 is 6681969822.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220 + ... + 67671.

It is an arithmetic number, because the mean of its divisors is an integer number (90432144).

Almost surely, 2^2289691866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2289691866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2893828608).

2289691866 is an abundant number, since it is smaller than the sum of its proper divisors (3497965350).

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

2289691866 is a wasteful number, since it uses less digits than its factorization.

2289691866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67987.

The product of its digits is 4478976, while the sum is 57.

The square root of 2289691866 is about 47850.7248220965. The cubic root of 2289691866 is about 1318.0311684061.

The spelling of 2289691866 in words is "two billion, two hundred eighty-nine million, six hundred ninety-one thousand, eight hundred sixty-six".