12878220 has 48 divisors (see below), whose sum is σ = 37039968. Its totient is φ = 3340800.

The previous prime is 12878213. The next prime is 12878227. The reversal of 12878220 is 2287821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12878213) and next prime (12878227).

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 (12878227) 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, 681 + ... + 5120.

It is an arithmetic number, because the mean of its divisors is an integer number (771666).

Almost surely, 2^12878220 is an apocalyptic number.

12878220 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 12878220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18519984).

12878220 is an abundant number, since it is smaller than the sum of its proper divisors (24161748).

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

12878220 is a wasteful number, since it uses less digits than its factorization.

12878220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850 (or 5848 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 12878220 is about 3588.6236916121. The cubic root of 12878220 is about 234.3969447897.

The spelling of 12878220 in words is "twelve million, eight hundred seventy-eight thousand, two hundred twenty".