12218370 has 32 divisors (see below), whose sum is σ = 29557440. Its totient is φ = 3232320.

The previous prime is 12218363. The next prime is 12218417. The reversal of 12218370 is 7381221.

It is a self number, because there is not a number n which added to its sum of digits gives 12218370.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2376 + ... + 5484.

It is an arithmetic number, because the mean of its divisors is an integer number (923670).

Almost surely, 2^12218370 is an apocalyptic number.

12218370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12218370 is an abundant number, since it is smaller than the sum of its proper divisors (17339070).

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

12218370 is a wasteful number, since it uses less digits than its factorization.

12218370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 12218370 is about 3495.4785080157. The cubic root of 12218370 is about 230.3232380157.

Adding to 12218370 its reverse (7381221), we get a palindrome (19599591).

It can be divided in two parts, 1221 and 8370, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 12218370 in words is "twelve million, two hundred eighteen thousand, three hundred seventy".