13878228 has 96 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 3588480.

The previous prime is 13878217. The next prime is 13878229. The reversal of 13878228 is 82287831.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13878229) 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 31 ways as a sum of consecutive naturals, for example, 77443 + ... + 77621.

It is an arithmetic number, because the mean of its divisors is an integer number (423360).

Almost surely, 2^13878228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13878228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20321280).

13878228 is an abundant number, since it is smaller than the sum of its proper divisors (26764332).

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

13878228 is a wasteful number, since it uses less digits than its factorization.

13878228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 275 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 13878228 is about 3725.3493795884. The cubic root of 13878228 is about 240.3134099920.

The spelling of 13878228 in words is "thirteen million, eight hundred seventy-eight thousand, two hundred twenty-eight".