404220240442 has 4 divisors (see below), whose sum is σ = 606330360666. Its totient is φ = 202110120220.

The previous prime is 404220240377. The next prime is 404220240497. The reversal of 404220240442 is 244042022404.

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., 244036988001 + 160183252441 = 494001^2 + 400229^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404220240442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055060109 + ... + 101055060112.

Almost surely, 2^404220240442 is an apocalyptic number.

404220240442 is a deficient number, since it is larger than the sum of its proper divisors (202110120224).

404220240442 is a wasteful number, since it uses less digits than its factorization.

404220240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202110120223.

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

Adding to 404220240442 its reverse (244042022404), we get a palindrome (648262262846).

The spelling of 404220240442 in words is "four hundred four billion, two hundred twenty million, two hundred forty thousand, four hundred forty-two".