13871228 has 12 divisors (see below), whose sum is σ = 27742512. Its totient is φ = 5944800.

The previous prime is 13871183. The next prime is 13871233. The reversal of 13871228 is 82217831.

13871228 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13871194 and 13871203.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 247673 + ... + 247728.

It is an arithmetic number, because the mean of its divisors is an integer number (2311876).

Almost surely, 2^13871228 is an apocalyptic number.

It is an amenable number.

13871228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13871228 is a wasteful number, since it uses less digits than its factorization.

13871228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495412 (or 495410 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 13871228 is about 3724.4097518936. The cubic root of 13871228 is about 240.2729995310.

The spelling of 13871228 in words is "thirteen million, eight hundred seventy-one thousand, two hundred twenty-eight".