12658220 has 12 divisors (see below), whose sum is σ = 26582304. Its totient is φ = 5063280.

The previous prime is 12658193. The next prime is 12658223. The reversal of 12658220 is 2285621.

It is a self number, because there is not a number n which added to its sum of digits gives 12658220.

It is not an unprimeable number, because it can be changed into a prime (12658223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316436 + ... + 316475.

It is an arithmetic number, because the mean of its divisors is an integer number (2215192).

Almost surely, 2^12658220 is an apocalyptic number.

12658220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12658220 is an abundant number, since it is smaller than the sum of its proper divisors (13924084).

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

12658220 is a wasteful number, since it uses less digits than its factorization.

12658220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632920 (or 632918 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 12658220 is about 3557.8392318934. The cubic root of 12658220 is about 233.0545286734.

The spelling of 12658220 in words is "twelve million, six hundred fifty-eight thousand, two hundred twenty".