2164443738 has 32 divisors (see below), whose sum is σ = 4424006400. Its totient is φ = 705796416.

The previous prime is 2164443737. The next prime is 2164443763. The reversal of 2164443738 is 8373444612.

It is a self number, because there is not a number n which added to its sum of digits gives 2164443738.

It is not an unprimeable number, because it can be changed into a prime (2164443731) 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 15 ways as a sum of consecutive naturals, for example, 30720 + ... + 72612.

It is an arithmetic number, because the mean of its divisors is an integer number (138250200).

Almost surely, 2^2164443738 is an apocalyptic number.

2164443738 is an abundant number, since it is smaller than the sum of its proper divisors (2259562662).

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

2164443738 is a wasteful number, since it uses less digits than its factorization.

2164443738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42086.

The product of its digits is 387072, while the sum is 42.

The square root of 2164443738 is about 46523.5826006553. The cubic root of 2164443738 is about 1293.5466645269.

The spelling of 2164443738 in words is "two billion, one hundred sixty-four million, four hundred forty-three thousand, seven hundred thirty-eight".