12663280 has 40 divisors (see below), whose sum is σ = 33649632. Its totient is φ = 4341504.

The previous prime is 12663269. The next prime is 12663281. The reversal of 12663280 is 8236621.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663281) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 10747 + ... + 11866.

Almost surely, 2^12663280 is an apocalyptic number.

12663280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12663280 is an abundant number, since it is smaller than the sum of its proper divisors (20986352).

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

12663280 is a wasteful number, since it uses less digits than its factorization.

12663280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22633 (or 22627 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 12663280 is about 3558.5502666114. The cubic root of 12663280 is about 233.0855782948.

The spelling of 12663280 in words is "twelve million, six hundred sixty-three thousand, two hundred eighty".