4042042040 has 64 divisors (see below), whose sum is σ = 9423928800. Its totient is φ = 1558455808.

The previous prime is 4042042019. The next prime is 4042042049. The reversal of 4042042040 is 402402404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042042049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782747 + ... + 787893.

Almost surely, 2^4042042040 is an apocalyptic number.

4042042040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4042042040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4711964400).

4042042040 is an abundant number, since it is smaller than the sum of its proper divisors (5381886760).

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

4042042040 is a wasteful number, since it uses less digits than its factorization.

4042042040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5864 (or 5860 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 4042042040 is about 63577.0559242877. The cubic root of 4042042040 is about 1592.9431452172.

Adding to 4042042040 its reverse (402402404), we get a palindrome (4444444444).

The spelling of 4042042040 in words is "four billion, forty-two million, forty-two thousand, forty", and thus it is an eban number.