2144889774 has 32 divisors (see below), whose sum is σ = 4769184000. Its totient is φ = 714548952.

The previous prime is 2144889749. The next prime is 2144889809. The reversal of 2144889774 is 4779884412.

2144889774 is a `hidden beast` number, since 2 + 1 + 4 + 488 + 97 + 74 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2144889774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90897 + ... + 112035.

It is an arithmetic number, because the mean of its divisors is an integer number (149037000).

Almost surely, 2^2144889774 is an apocalyptic number.

2144889774 is an abundant number, since it is smaller than the sum of its proper divisors (2624294226).

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

2144889774 is a wasteful number, since it uses less digits than its factorization.

2144889774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23029 (or 23023 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 2144889774 is about 46312.9547103184. The cubic root of 2144889774 is about 1289.6394990481.

The spelling of 2144889774 in words is "two billion, one hundred forty-four million, eight hundred eighty-nine thousand, seven hundred seventy-four".