12216488 has 8 divisors (see below), whose sum is σ = 22905930. Its totient is φ = 6108240.

The previous prime is 12216439. The next prime is 12216493. The reversal of 12216488 is 88461221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7279204 + 4937284 = 2698^2 + 2222^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763523 + ... + 763538.

Almost surely, 2^12216488 is an apocalyptic number.

It is an amenable number.

12216488 is a deficient number, since it is larger than the sum of its proper divisors (10689442).

12216488 is a wasteful number, since it uses less digits than its factorization.

12216488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527067 (or 1527063 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 12216488 is about 3495.2092927320. The cubic root of 12216488 is about 230.3114118176.

The spelling of 12216488 in words is "twelve million, two hundred sixteen thousand, four hundred eighty-eight".