13289220 has 144 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 2965248.

The previous prime is 13289209. The next prime is 13289231. The reversal of 13289220 is 2298231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13289209) and next prime (13289231).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66681 + ... + 66879.

It is an arithmetic number, because the mean of its divisors is an integer number (327600).

Almost surely, 2^13289220 is an apocalyptic number.

13289220 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 13289220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23587200).

13289220 is an abundant number, since it is smaller than the sum of its proper divisors (33885180).

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

13289220 is a wasteful number, since it uses less digits than its factorization.

13289220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 13289220 is about 3645.4382452594. The cubic root of 13289220 is about 236.8644206654.

The spelling of 13289220 in words is "thirteen million, two hundred eighty-nine thousand, two hundred twenty".