12803220 has 36 divisors (see below), whose sum is σ = 38836980. Its totient is φ = 3414144.

The previous prime is 12803213. The next prime is 12803237. The reversal of 12803220 is 2230821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3549456 + 9253764 = 1884^2 + 3042^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12803193 and 12803202.

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 11 ways as a sum of consecutive naturals, for example, 35385 + ... + 35744.

It is an arithmetic number, because the mean of its divisors is an integer number (1078805).

Almost surely, 2^12803220 is an apocalyptic number.

12803220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12803220 is an abundant number, since it is smaller than the sum of its proper divisors (26033760).

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

12803220 is a wasteful number, since it uses less digits than its factorization.

12803220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71144 (or 71139 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12803220 is about 3578.1587443824. The cubic root of 12803220 is about 233.9410326981.

It can be divided in two parts, 1 and 2803220, that added together give a cube (2803221 = 141³).

The spelling of 12803220 in words is "twelve million, eight hundred three thousand, two hundred twenty".