12216380 has 24 divisors (see below), whose sum is σ = 27987120. Its totient is φ = 4442240.

The previous prime is 12216377. The next prime is 12216389. The reversal of 12216380 is 8361221.

12216380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27545 + ... + 27984.

It is an arithmetic number, because the mean of its divisors is an integer number (1166130).

Almost surely, 2^12216380 is an apocalyptic number.

12216380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12216380 is an abundant number, since it is smaller than the sum of its proper divisors (15770740).

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

12216380 is a wasteful number, since it uses less digits than its factorization.

12216380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55549 (or 55547 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 12216380 is about 3495.1938429792. The cubic root of 12216380 is about 230.3107331254.

The spelling of 12216380 in words is "twelve million, two hundred sixteen thousand, three hundred eighty".