12216690 has 32 divisors (see below), whose sum is σ = 32578560. Its totient is φ = 3257712.

The previous prime is 12216671. The next prime is 12216719. The reversal of 12216690 is 9661221.

It is a super-2 number, since 2×12216690² = 298495029112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22354 + ... + 22893.

It is an arithmetic number, because the mean of its divisors is an integer number (1018080).

Almost surely, 2^12216690 is an apocalyptic number.

12216690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12216690 is an abundant number, since it is smaller than the sum of its proper divisors (20361870).

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

12216690 is a wasteful number, since it uses less digits than its factorization.

12216690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45263 (or 45257 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12216690 is about 3495.2381893084. The cubic root of 12216690 is about 230.3126812126.

The spelling of 12216690 in words is "twelve million, two hundred sixteen thousand, six hundred ninety".