13424220 has 144 divisors (see below), whose sum is σ = 44579808. Its totient is φ = 3256320.

The previous prime is 13424161. The next prime is 13424221. The reversal of 13424220 is 2242431.

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 = 13424193 and 13424202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13424221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125407 + ... + 125513.

It is an arithmetic number, because the mean of its divisors is an integer number (309582).

Almost surely, 2^13424220 is an apocalyptic number.

13424220 is a gapful number since it is divisible by the number (10) 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 13424220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22289904).

13424220 is an abundant number, since it is smaller than the sum of its proper divisors (31155588).

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

13424220 is a wasteful number, since it uses less digits than its factorization.

13424220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 13424220 is about 3663.9077499304. The cubic root of 13424220 is about 237.6637909866.

Adding to 13424220 its reverse (2242431), we get a palindrome (15666651).

The spelling of 13424220 in words is "thirteen million, four hundred twenty-four thousand, two hundred twenty".