404220442 has 4 divisors (see below), whose sum is σ = 606330666. Its totient is φ = 202110220.

The previous prime is 404220433. The next prime is 404220451. The reversal of 404220442 is 244022404.

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

It is an interprime number because it is at equal distance from previous prime (404220433) and next prime (404220451).

It can be written as a sum of positive squares in only one way, i.e., 385376161 + 18844281 = 19631^2 + 4341^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055109 + ... + 101055112.

Almost surely, 2^404220442 is an apocalyptic number.

404220442 is a deficient number, since it is larger than the sum of its proper divisors (202110224).

404220442 is a wasteful number, since it uses less digits than its factorization.

404220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202110223.

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 404220442 is about 20105.2341941098. The cubic root of 404220442 is about 739.3886123716.

Adding to 404220442 its reverse (244022404), we get a palindrome (648242846).

The spelling of 404220442 in words is "four hundred four million, two hundred twenty thousand, four hundred forty-two".