404140331 has 4 divisors (see below), whose sum is σ = 461874672. Its totient is φ = 346405992.

The previous prime is 404140277. The next prime is 404140349. The reversal of 404140331 is 133041404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404140331 - 2⁶ = 404140267 is a prime.

It is a super-2 number, since 2×404140331² = 326658814281579122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (404140351) 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 3 ways as a sum of consecutive naturals, for example, 28867160 + ... + 28867173.

It is an arithmetic number, because the mean of its divisors is an integer number (115468668).

Almost surely, 2^404140331 is an apocalyptic number.

404140331 is a deficient number, since it is larger than the sum of its proper divisors (57734341).

404140331 is an equidigital number, since it uses as much as digits as its factorization.

404140331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57734340.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 404140331 is about 20103.2418032515. The cubic root of 404140331 is about 739.3397635517.

Adding to 404140331 its reverse (133041404), we get a palindrome (537181735).

The spelling of 404140331 in words is "four hundred four million, one hundred forty thousand, three hundred thirty-one".