2004155442 has 48 divisors (see below), whose sum is σ = 4377790872. Its totient is φ = 662618880.

The previous prime is 2004155441. The next prime is 2004155459. The reversal of 2004155442 is 2445514002.

2004155442 is a `hidden beast` number, since 200 + 4 + 15 + 5 + 442 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 895864761 + 1108290681 = 29931^2 + 33291^2 .

It is not an unprimeable number, because it can be changed into a prime (2004155441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2009688 + ... + 2010684.

Almost surely, 2^2004155442 is an apocalyptic number.

2004155442 is an abundant number, since it is smaller than the sum of its proper divisors (2373635430).

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

2004155442 is a wasteful number, since it uses less digits than its factorization.

2004155442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803 (or 1800 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2004155442 is about 44767.7946966343. The cubic root of 2004155442 is about 1260.7930344011.

Adding to 2004155442 its reverse (2445514002), we get a palindrome (4449669444).

The spelling of 2004155442 in words is "two billion, four million, one hundred fifty-five thousand, four hundred forty-two".