12810220 has 24 divisors (see below), whose sum is σ = 27229104. Its totient is φ = 5061696.

The previous prime is 12810211. The next prime is 12810229. The reversal of 12810220 is 2201821.

It is an interprime number because it is at equal distance from previous prime (12810211) and next prime (12810229).

It is a junction number, because it is equal to n+sod(n) for n = 12810194 and 12810203.

It is not an unprimeable number, because it can be changed into a prime (12810229) 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, 2199 + ... + 5518.

It is an arithmetic number, because the mean of its divisors is an integer number (1134546).

Almost surely, 2^12810220 is an apocalyptic number.

12810220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12810220 is an abundant number, since it is smaller than the sum of its proper divisors (14418884).

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

12810220 is a wasteful number, since it uses less digits than its factorization.

12810220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7809 (or 7807 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 12810220 is about 3579.1367674343. The cubic root of 12810220 is about 233.9836597059.

The spelling of 12810220 in words is "twelve million, eight hundred ten thousand, two hundred twenty".