12620220 has 48 divisors (see below), whose sum is σ = 36560160. Its totient is φ = 3248896.

The previous prime is 12620207. The next prime is 12620221. The reversal of 12620220 is 2202621.

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 12620220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12620221) 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, 1887 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^12620220 is an apocalyptic number.

12620220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12620220 is an abundant number, since it is smaller than the sum of its proper divisors (23939940).

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

12620220 is a wasteful number, since it uses less digits than its factorization.

12620220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7294 (or 7292 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12620220 is about 3552.4948979555. The cubic root of 12620220 is about 232.8210848748.

Adding to 12620220 its reverse (2202621), we get a palindrome (14822841).

The spelling of 12620220 in words is "twelve million, six hundred twenty thousand, two hundred twenty".