12078216 has 48 divisors (see below), whose sum is σ = 32900400. Its totient is φ = 4002912.

The previous prime is 12078203. The next prime is 12078217. The reversal of 12078216 is 61287021.

It is a self number, because there is not a number n which added to its sum of digits gives 12078216.

It is not an unprimeable number, because it can be changed into a prime (12078217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15975 + ... + 16713.

It is an arithmetic number, because the mean of its divisors is an integer number (685425).

Almost surely, 2^12078216 is an apocalyptic number.

It is an amenable number.

12078216 is an abundant number, since it is smaller than the sum of its proper divisors (20822184).

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

12078216 is a wasteful number, since it uses less digits than its factorization.

12078216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 12078216 is about 3475.3727857598. The cubic root of 12078216 is about 229.4391881824.

The spelling of 12078216 in words is "twelve million, seventy-eight thousand, two hundred sixteen".