2189742364 has 12 divisors (see below), whose sum is σ = 3835191024. Its totient is φ = 1093973504.

The previous prime is 2189742299. The next prime is 2189742367. The reversal of 2189742364 is 4632479812.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189742367) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 218917 + ... + 228700.

It is an arithmetic number, because the mean of its divisors is an integer number (319599252).

Almost surely, 2^2189742364 is an apocalyptic number.

It is an amenable number.

2189742364 is a deficient number, since it is larger than the sum of its proper divisors (1645448660).

2189742364 is a wasteful number, since it uses less digits than its factorization.

2189742364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448844 (or 448842 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The square root of 2189742364 is about 46794.6830740416. The cubic root of 2189742364 is about 1298.5669344385.

It can be divided in two parts, 21897 and 42364, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 2189742364 in words is "two billion, one hundred eighty-nine million, seven hundred forty-two thousand, three hundred sixty-four".