12378420 has 96 divisors (see below), whose sum is σ = 39123840. Its totient is φ = 3289248.

The previous prime is 12378419. The next prime is 12378427. The reversal of 12378420 is 2487321.

12378420 is a `hidden beast` number, since 1 + 237 + 8 + 420 = 666.

12378420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12378427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43599 + ... + 43881.

It is an arithmetic number, because the mean of its divisors is an integer number (407540).

Almost surely, 2^12378420 is an apocalyptic number.

12378420 is a gapful number since it is divisible by the number (10) 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 12378420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19561920).

12378420 is an abundant number, since it is smaller than the sum of its proper divisors (26745420).

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

12378420 is an equidigital number, since it uses as much as digits as its factorization.

12378420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 12378420 is about 3518.2978839206. The cubic root of 12378420 is about 231.3245564323.

The spelling of 12378420 in words is "twelve million, three hundred seventy-eight thousand, four hundred twenty".