404004243 has 16 divisors (see below), whose sum is σ = 546771456. Its totient is φ = 265306080.

The previous prime is 404004241. The next prime is 404004247. The reversal of 404004243 is 342400404.

It is not a de Polignac number, because 404004243 - 2¹ = 404004241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404004241) 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, 89173 + ... + 93593.

It is an arithmetic number, because the mean of its divisors is an integer number (34173216).

Almost surely, 2^404004243 is an apocalyptic number.

404004243 is a deficient number, since it is larger than the sum of its proper divisors (142767213).

404004243 is a wasteful number, since it uses less digits than its factorization.

404004243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4874.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 404004243 is about 20099.8567905346. The cubic root of 404004243 is about 739.2567671619.

Adding to 404004243 its reverse (342400404), we get a palindrome (746404647).

The spelling of 404004243 in words is "four hundred four million, four thousand, two hundred forty-three".