404242240220 has 96 divisors (see below), whose sum is σ = 1099800844800. Its totient is φ = 121202521344.

The previous prime is 404242240217. The next prime is 404242240229. The reversal of 404242240220 is 22042242404.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 404242240220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404242240229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5810450 + ... + 5879609.

It is an arithmetic number, because the mean of its divisors is an integer number (11456258800).

Almost surely, 2^404242240220 is an apocalyptic number.

It is an amenable number.

404242240220 is an abundant number, since it is smaller than the sum of its proper divisors (695558604580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404242240220 is a wasteful number, since it uses less digits than its factorization.

404242240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11690107 (or 11690105 counting only the distinct ones).

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

Adding to 404242240220 its reverse (22042242404), we get a palindrome (426284482624).

The spelling of 404242240220 in words is "four hundred four billion, two hundred forty-two million, two hundred forty thousand, two hundred twenty".