13947228 has 42 divisors (see below), whose sum is σ = 36602384. Its totient is φ = 4648104.

The previous prime is 13947221. The next prime is 13947229. The reversal of 13947228 is 82274931.

13947228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13947192 and 13947201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13947221) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 525 + ... + 5307.

Almost surely, 2^13947228 is an apocalyptic number.

13947228 is a gapful number since it is divisible by the number (18) 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 13947228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18301192).

13947228 is an abundant number, since it is smaller than the sum of its proper divisors (22655156).

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

13947228 is an equidigital number, since it uses as much as digits as its factorization.

13947228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805 (or 4788 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 13947228 is about 3734.5987736302. The cubic root of 13947228 is about 240.7110164847.

The spelling of 13947228 in words is "thirteen million, nine hundred forty-seven thousand, two hundred twenty-eight".