12800220 has 24 divisors (see below), whose sum is σ = 35840784. Its totient is φ = 3413376.

The previous prime is 12800209. The next prime is 12800237. The reversal of 12800220 is 2200821.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12800220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106609 + ... + 106728.

It is an arithmetic number, because the mean of its divisors is an integer number (1493366).

Almost surely, 2^12800220 is an apocalyptic number.

12800220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12800220 is an abundant number, since it is smaller than the sum of its proper divisors (23040564).

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

12800220 is a wasteful number, since it uses less digits than its factorization.

12800220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213349 (or 213347 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 12800220 is about 3577.7395098022. The cubic root of 12800220 is about 233.9227592241.

The spelling of 12800220 in words is "twelve million, eight hundred thousand, two hundred twenty".