424401220 has 24 divisors (see below), whose sum is σ = 893035584. Its totient is φ = 169418976.

The previous prime is 424401199. The next prime is 424401227. The reversal of 424401220 is 22104424.

It is not an unprimeable number, because it can be changed into a prime (424401227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11034 + ... + 31153.

It is an arithmetic number, because the mean of its divisors is an integer number (37209816).

Almost surely, 2^424401220 is an apocalyptic number.

It is an amenable number.

424401220 is an abundant number, since it is smaller than the sum of its proper divisors (468634364).

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

424401220 is a wasteful number, since it uses less digits than its factorization.

424401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42699 (or 42697 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 424401220 is about 20601.0004611427. Note that the first 3 decimals coincide. The cubic root of 424401220 is about 751.4940410714.

Subtracting from 424401220 its sum of digits (19), we obtain a square (424401201 = 20601²).

Adding to 424401220 its reverse (22104424), we get a palindrome (446505644).

It can be divided in two parts, 42440 and 1220, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 424401220 in words is "four hundred twenty-four million, four hundred one thousand, two hundred twenty".