13887228 has 48 divisors (see below), whose sum is σ = 33417216. Its totient is φ = 4487040.

The previous prime is 13887227. The next prime is 13887241. The reversal of 13887228 is 82278831.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72613 + ... + 72803.

It is an arithmetic number, because the mean of its divisors is an integer number (696192).

Almost surely, 2^13887228 is an apocalyptic number.

It is an amenable number.

13887228 is an abundant number, since it is smaller than the sum of its proper divisors (19529988).

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

13887228 is a wasteful number, since it uses less digits than its factorization.

13887228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 352 counting only the distinct ones).

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

The square root of 13887228 is about 3726.5571242100. The cubic root of 13887228 is about 240.3653463375.

The spelling of 13887228 in words is "thirteen million, eight hundred eighty-seven thousand, two hundred twenty-eight".