404144420 has 12 divisors (see below), whose sum is σ = 848703324. Its totient is φ = 161657760.

The previous prime is 404144371. The next prime is 404144441. The reversal of 404144420 is 24441404.

It can be written as a sum of positive squares in 2 ways, for example, as 242549476 + 161594944 = 15574^2 + 12712^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

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, 10103591 + ... + 10103630.

It is an arithmetic number, because the mean of its divisors is an integer number (70725277).

Almost surely, 2^404144420 is an apocalyptic number.

It is an amenable number.

404144420 is an abundant number, since it is smaller than the sum of its proper divisors (444558904).

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

404144420 is a wasteful number, since it uses less digits than its factorization.

404144420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20207230 (or 20207228 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 404144420 is about 20103.3435030096. The cubic root of 404144420 is about 739.3422570339.

Adding to 404144420 its reverse (24441404), we get a palindrome (428585824).

The spelling of 404144420 in words is "four hundred four million, one hundred forty-four thousand, four hundred twenty".