12002816 has 80 divisors (see below), whose sum is σ = 29167776. Its totient is φ = 4816896.

The previous prime is 12002777. The next prime is 12002843. The reversal of 12002816 is 61820021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60830 + ... + 61026.

Almost surely, 2^12002816 is an apocalyptic number.

12002816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12002816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14583888).

12002816 is an abundant number, since it is smaller than the sum of its proper divisors (17164960).

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

12002816 is an equidigital number, since it uses as much as digits as its factorization.

12002816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 12002816 is about 3464.5080458847. The cubic root of 12002816 is about 228.9607555284.

Adding to 12002816 its reverse (61820021), we get a palindrome (73822837).

The spelling of 12002816 in words is "twelve million, two thousand, eight hundred sixteen".