13478220 has 144 divisors (see below), whose sum is σ = 49271040. Its totient is φ = 2913408.

The previous prime is 13478203. The next prime is 13478251. The reversal of 13478220 is 2287431.

13478220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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, 23659 + ... + 24221.

It is an arithmetic number, because the mean of its divisors is an integer number (342160).

Almost surely, 2^13478220 is an apocalyptic number.

13478220 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 13478220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24635520).

13478220 is an abundant number, since it is smaller than the sum of its proper divisors (35792820).

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

13478220 is a wasteful number, since it uses less digits than its factorization.

13478220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 13478220 is about 3671.2695351881. The cubic root of 13478220 is about 237.9820385193.

The spelling of 13478220 in words is "thirteen million, four hundred seventy-eight thousand, two hundred twenty".