2001744138 has 32 divisors (see below), whose sum is σ = 4022618112. Its totient is φ = 664068800.

The previous prime is 2001744103. The next prime is 2001744139. The reversal of 2001744138 is 8314471002.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001744139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1886128 + ... + 1887188.

It is an arithmetic number, because the mean of its divisors is an integer number (125706816).

Almost surely, 2^2001744138 is an apocalyptic number.

2001744138 is an abundant number, since it is smaller than the sum of its proper divisors (2020873974).

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

2001744138 is a wasteful number, since it uses less digits than its factorization.

2001744138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 2001744138 is about 44740.8553561507. The cubic root of 2001744138 is about 1260.2871895125.

The spelling of 2001744138 in words is "two billion, one million, seven hundred forty-four thousand, one hundred thirty-eight".