12816450 has 72 divisors (see below), whose sum is σ = 36270000. Its totient is φ = 3235680.

The previous prime is 12816449. The next prime is 12816457. The reversal of 12816450 is 5461821.

12816450 is a `hidden beast` number, since 12 + 8 + 1 + 645 + 0 = 666.

It is a super-3 number, since 3×12816450³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12816457) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7801 + ... + 9299.

It is an arithmetic number, because the mean of its divisors is an integer number (503750).

Almost surely, 2^12816450 is an apocalyptic number.

12816450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12816450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18135000).

12816450 is an abundant number, since it is smaller than the sum of its proper divisors (23453550).

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

12816450 is a wasteful number, since it uses less digits than its factorization.

12816450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12816450 is about 3580.0069832334. The cubic root of 12816450 is about 234.0215846844.

The spelling of 12816450 in words is "twelve million, eight hundred sixteen thousand, four hundred fifty".