4004055 has 24 divisors (see below), whose sum is σ = 7572240. Its totient is φ = 1941120.

The previous prime is 4004023. The next prime is 4004057. The reversal of 4004055 is 5504004.

It is a happy number.

It is not a de Polignac number, because 4004055 - 2⁵ = 4004023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004057) 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 23 ways as a sum of consecutive naturals, for example, 3550 + ... + 4539.

It is an arithmetic number, because the mean of its divisors is an integer number (315510).

Almost surely, 2^4004055 is an apocalyptic number.

4004055 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

4004055 is a deficient number, since it is larger than the sum of its proper divisors (3568185).

4004055 is a wasteful number, since it uses less digits than its factorization.

4004055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111 (or 8108 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 4004055 is about 2001.0134932079. The cubic root of 4004055 is about 158.7937280081.

Adding to 4004055 its reverse (5504004), we get a palindrome (9508059).

The spelling of 4004055 in words is "four million, four thousand, fifty-five".