424004220 has 120 divisors (see below), whose sum is σ = 1337135184. Its totient is φ = 112472064.

The previous prime is 424004219. The next prime is 424004227. The reversal of 424004220 is 22400424.

424004220 is a `hidden beast` number, since 4 + 240 + 0 + 422 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 424004193 and 424004202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424004227) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 367164 + ... + 368316.

Almost surely, 2^424004220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424004220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668567592).

424004220 is an abundant number, since it is smaller than the sum of its proper divisors (913130964).

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

424004220 is a wasteful number, since it uses less digits than its factorization.

424004220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 424004220 is about 20591.3627523775. The cubic root of 424004220 is about 751.2596432142.

Adding to 424004220 its reverse (22400424), we get a palindrome (446404644).

The spelling of 424004220 in words is "four hundred twenty-four million, four thousand, two hundred twenty".