12220988 has 24 divisors (see below), whose sum is σ = 23167200. Its totient is φ = 5607360.

The previous prime is 12220979. The next prime is 12220991. The reversal of 12220988 is 88902221.

It is a super-2 number, since 2×12220988² = 298705095392288, which contains 22 as substring.

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, 9758 + ... + 10938.

It is an arithmetic number, because the mean of its divisors is an integer number (965300).

Almost surely, 2^12220988 is an apocalyptic number.

It is an amenable number.

12220988 is a deficient number, since it is larger than the sum of its proper divisors (10946212).

12220988 is a wasteful number, since it uses less digits than its factorization.

12220988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12220988 is about 3495.8529717367. The cubic root of 12220988 is about 230.3396871049.

The spelling of 12220988 in words is "twelve million, two hundred twenty thousand, nine hundred eighty-eight".