404442342 has 32 divisors (see below), whose sum is σ = 951631200. Its totient is φ = 126883584.

The previous prime is 404442289. The next prime is 404442343. The reversal of 404442342 is 243244404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404442343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219367 + ... + 221202.

It is an arithmetic number, because the mean of its divisors is an integer number (29738475).

Almost surely, 2^404442342 is an apocalyptic number.

404442342 is an abundant number, since it is smaller than the sum of its proper divisors (547188858).

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

404442342 is a wasteful number, since it uses less digits than its factorization.

404442342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440597 (or 440591 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

The square root of 404442342 is about 20110.7519004139. The cubic root of 404442342 is about 739.5238853585.

Adding to 404442342 its reverse (243244404), we get a palindrome (647686746).

The spelling of 404442342 in words is "four hundred four million, four hundred forty-two thousand, three hundred forty-two".