13891228 has 12 divisors (see below), whose sum is σ = 26179720. Its totient is φ = 6411312.

The previous prime is 13891217. The next prime is 13891231. The reversal of 13891228 is 82219831.

It is a hoax number, since the sum of its digits (34) 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 = 13891193 and 13891202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133518 + ... + 133621.

Almost surely, 2^13891228 is an apocalyptic number.

It is an amenable number.

13891228 is a deficient number, since it is larger than the sum of its proper divisors (12288492).

13891228 is a wasteful number, since it uses less digits than its factorization.

13891228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267156 (or 267154 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 13891228 is about 3727.0937739746. The cubic root of 13891228 is about 240.3884219551.

The spelling of 13891228 in words is "thirteen million, eight hundred ninety-one thousand, two hundred twenty-eight".