12218590 has 16 divisors (see below), whose sum is σ = 22462272. Its totient is φ = 4783264.

The previous prime is 12218587. The next prime is 12218611. The reversal of 12218590 is 9581221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12529 + ... + 13468.

It is an arithmetic number, because the mean of its divisors is an integer number (1403892).

Almost surely, 2^12218590 is an apocalyptic number.

12218590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12218590 is a deficient number, since it is larger than the sum of its proper divisors (10243682).

12218590 is a wasteful number, since it uses less digits than its factorization.

12218590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26051.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12218590 is about 3495.5099770992. The cubic root of 12218590 is about 230.3246203825.

The spelling of 12218590 in words is "twelve million, two hundred eighteen thousand, five hundred ninety".