404424442 has 8 divisors (see below), whose sum is σ = 610708500. Its totient is φ = 200854944.

The previous prime is 404424437. The next prime is 404424491. The reversal of 404424442 is 244424404.

It can be written as a sum of positive squares in 2 ways, for example, as 403648281 + 776161 = 20091^2 + 881^2 .

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

It is a super-2 number, since 2×404424442² = 327118258574022728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404424442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678267 + ... + 678862.

Almost surely, 2^404424442 is an apocalyptic number.

404424442 is a deficient number, since it is larger than the sum of its proper divisors (206284058).

404424442 is a wasteful number, since it uses less digits than its factorization.

404424442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357280.

The product of its (nonzero) digits is 16384, while the sum is 28.

The square root of 404424442 is about 20110.3068599164. The cubic root of 404424442 is about 739.5129751318.

Adding to 404424442 its reverse (244424404), we get a palindrome (648848846).

The spelling of 404424442 in words is "four hundred four million, four hundred twenty-four thousand, four hundred forty-two".