404542442 has 8 divisors (see below), whose sum is σ = 619724736. Its totient is φ = 197967532.

The previous prime is 404542441. The next prime is 404542483. The reversal of 404542442 is 244245404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (404542441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151728 + ... + 2151915.

It is an arithmetic number, because the mean of its divisors is an integer number (77465592).

Almost surely, 2^404542442 is an apocalyptic number.

404542442 is a deficient number, since it is larger than the sum of its proper divisors (215182294).

404542442 is a wasteful number, since it uses less digits than its factorization.

404542442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303692.

The product of its (nonzero) digits is 20480, while the sum is 29.

The square root of 404542442 is about 20113.2404649276. The cubic root of 404542442 is about 739.5848913634.

Adding to 404542442 its reverse (244245404), we get a palindrome (648787846).

The spelling of 404542442 in words is "four hundred four million, five hundred forty-two thousand, four hundred forty-two".