13629220 has 48 divisors (see below), whose sum is σ = 32006016. Its totient is φ = 4832000.

The previous prime is 13629211. The next prime is 13629221. The reversal of 13629220 is 2292631.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13629221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8265 + ... + 9775.

It is an arithmetic number, because the mean of its divisors is an integer number (666792).

Almost surely, 2^13629220 is an apocalyptic number.

13629220 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 13629220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16003008).

13629220 is an abundant number, since it is smaller than the sum of its proper divisors (18376796).

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

13629220 is a wasteful number, since it uses less digits than its factorization.

13629220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13629220 is about 3691.7773497328. Note that the first 3 decimals coincide. The cubic root of 13629220 is about 238.8674650178.

The spelling of 13629220 in words is "thirteen million, six hundred twenty-nine thousand, two hundred twenty".