13788225 has 60 divisors (see below), whose sum is σ = 27907440. Its totient is φ = 6674400.

The previous prime is 13788221. The next prime is 13788233. The reversal of 13788225 is 52288731.

It is not a de Polignac number, because 13788225 - 2² = 13788221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13788225.

It is not an unprimeable number, because it can be changed into a prime (13788221) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 21966 + ... + 22584.

It is an arithmetic number, because the mean of its divisors is an integer number (465124).

Almost surely, 2^13788225 is an apocalyptic number.

13788225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13788225 is the 1857-th decagonal number.

It is an amenable number.

13788225 is an abundant number, since it is smaller than the sum of its proper divisors (14119215).

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

13788225 is a wasteful number, since it uses less digits than its factorization.

13788225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 638 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 13788225 is about 3713.2499242577. The cubic root of 13788225 is about 239.7927899014.

The spelling of 13788225 in words is "thirteen million, seven hundred eighty-eight thousand, two hundred twenty-five".