2042745138 has 144 divisors (see below), whose sum is σ = 5569462080. Its totient is φ = 528555456.

The previous prime is 2042745137. The next prime is 2042745139. The reversal of 2042745138 is 8315472402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2042745137) and next prime (2042745139).

It is not an unprimeable number, because it can be changed into a prime (2042745137) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1265620 + ... + 1267232.

It is an arithmetic number, because the mean of its divisors is an integer number (38676820).

Almost surely, 2^2042745138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2042745138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2784731040).

2042745138 is an abundant number, since it is smaller than the sum of its proper divisors (3526716942).

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

2042745138 is a wasteful number, since it uses less digits than its factorization.

2042745138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 2042745138 is about 45196.7381345159. The cubic root of 2042745138 is about 1268.8337689099.

The spelling of 2042745138 in words is "two billion, forty-two million, seven hundred forty-five thousand, one hundred thirty-eight".