12280664 has 32 divisors (see below), whose sum is σ = 26600400. Its totient is φ = 5253120.

The previous prime is 12280661. The next prime is 12280687. The reversal of 12280664 is 46608221.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12280661) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2609 + ... + 5600.

Almost surely, 2^12280664 is an apocalyptic number.

It is an amenable number.

12280664 is an abundant number, since it is smaller than the sum of its proper divisors (14319736).

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

12280664 is a wasteful number, since it uses less digits than its factorization.

12280664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8243 (or 8239 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 12280664 is about 3504.3778335105. The cubic root of 12280664 is about 230.7140004807.

Adding to 12280664 its reverse (46608221), we get a palindrome (58888885).

The spelling of 12280664 in words is "twelve million, two hundred eighty thousand, six hundred sixty-four".