12099816 has 48 divisors (see below), whose sum is σ = 33003360. Its totient is φ = 4004640.

The previous prime is 12099809. The next prime is 12099839. The reversal of 12099816 is 61899021.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11221 + ... + 12251.

It is an arithmetic number, because the mean of its divisors is an integer number (687570).

Almost surely, 2^12099816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12099816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16501680).

12099816 is an abundant number, since it is smaller than the sum of its proper divisors (20903544).

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

12099816 is a wasteful number, since it uses less digits than its factorization.

12099816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206 (or 1199 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 12099816 is about 3478.4789779442. The cubic root of 12099816 is about 229.5758787644.

It can be divided in two parts, 1209 and 9816, that added together give a square (11025 = 105²).

The spelling of 12099816 in words is "twelve million, ninety-nine thousand, eight hundred sixteen".