12678420 has 48 divisors (see below), whose sum is σ = 36465408. Its totient is φ = 3288960.

The previous prime is 12678371. The next prime is 12678427. The reversal of 12678420 is 2487621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12678427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636 + ... + 5075.

It is an arithmetic number, because the mean of its divisors is an integer number (759696).

Almost surely, 2^12678420 is an apocalyptic number.

12678420 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 12678420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18232704).

12678420 is an abundant number, since it is smaller than the sum of its proper divisors (23786988).

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

12678420 is a wasteful number, since it uses less digits than its factorization.

12678420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760 (or 5758 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 12678420 is about 3560.6769019387. The cubic root of 12678420 is about 233.1784323374.

The spelling of 12678420 in words is "twelve million, six hundred seventy-eight thousand, four hundred twenty".