404424420242 has 4 divisors (see below), whose sum is σ = 606636630366. Its totient is φ = 202212210120.

The previous prime is 404424420229. The next prime is 404424420293. The reversal of 404424420242 is 242024424404.

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., 262829503561 + 141594916681 = 512669^2 + 376291^2 .

It is a super-2 number, since 2×404424420242² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 404424420199 and 404424420208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101106105059 + ... + 101106105062.

Almost surely, 2^404424420242 is an apocalyptic number.

404424420242 is a deficient number, since it is larger than the sum of its proper divisors (202212210124).

404424420242 is a wasteful number, since it uses less digits than its factorization.

404424420242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202212210123.

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 404424420242 its reverse (242024424404), we get a palindrome (646448844646).

The spelling of 404424420242 in words is "four hundred four billion, four hundred twenty-four million, four hundred twenty thousand, two hundred forty-two".