220220424 has 64 divisors (see below), whose sum is σ = 620894400. Its totient is φ = 72306432.

The previous prime is 220220419. The next prime is 220220437. The reversal of 220220424 is 424022022.

220220424 is a `hidden beast` number, since 2 + 20 + 220 + 424 = 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 = 220220397 and 220220406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6864 + ... + 22080.

It is an arithmetic number, because the mean of its divisors is an integer number (9701475).

Almost surely, 2^220220424 is an apocalyptic number.

220220424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220220424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310447200).

220220424 is an abundant number, since it is smaller than the sum of its proper divisors (400673976).

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

220220424 is a wasteful number, since it uses less digits than its factorization.

220220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15299 (or 15289 counting only the distinct ones).

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

The square root of 220220424 is about 14839.8256054443. The cubic root of 220220424 is about 603.8826212267.

Adding to 220220424 its reverse (424022022), we get a palindrome (644242446).

The spelling of 220220424 in words is "two hundred twenty million, two hundred twenty thousand, four hundred twenty-four".