404442242 has 4 divisors (see below), whose sum is σ = 606663366. Its totient is φ = 202221120.

The previous prime is 404442229. The next prime is 404442271. The reversal of 404442242 is 242244404.

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

It can be written as a sum of positive squares in only one way, i.e., 234426721 + 170015521 = 15311^2 + 13039^2 .

It is a super-2 number, since 2×404442242² = 327147054227973128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110559 + ... + 101110562.

Almost surely, 2^404442242 is an apocalyptic number.

404442242 is a deficient number, since it is larger than the sum of its proper divisors (202221124).

404442242 is a wasteful number, since it uses less digits than its factorization.

404442242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202221123.

The product of its (nonzero) digits is 8192, while the sum is 26.

The square root of 404442242 is about 20110.7494141815. The cubic root of 404442242 is about 739.5238244084.

Adding to 404442242 its reverse (242244404), we get a palindrome (646686646).

The spelling of 404442242 in words is "four hundred four million, four hundred forty-two thousand, two hundred forty-two".