13812228 has 48 divisors (see below), whose sum is σ = 37920960. Its totient is φ = 4332672.

The previous prime is 13812217. The next prime is 13812229. The reversal of 13812228 is 82221831.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13812229) 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, 1926 + ... + 5597.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^13812228 is an apocalyptic number.

13812228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13812228 is an abundant number, since it is smaller than the sum of its proper divisors (24108732).

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

13812228 is a wasteful number, since it uses less digits than its factorization.

13812228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7553 (or 7545 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 13812228 is about 3716.4805932495. The cubic root of 13812228 is about 239.9318556533.

The spelling of 13812228 in words is "thirteen million, eight hundred twelve thousand, two hundred twenty-eight".