12405680 has 40 divisors (see below), whose sum is σ = 32965152. Its totient is φ = 4253184.

The previous prime is 12405667. The next prime is 12405691. The reversal of 12405680 is 8650421.

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

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 7 ways as a sum of consecutive naturals, for example, 10517 + ... + 11636.

Almost surely, 2^12405680 is an apocalyptic number.

12405680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12405680 is an abundant number, since it is smaller than the sum of its proper divisors (20559472).

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

12405680 is a wasteful number, since it uses less digits than its factorization.

12405680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22173 (or 22167 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 12405680 is about 3522.1697857997. The cubic root of 12405680 is about 231.4942410950.

The spelling of 12405680 in words is "twelve million, four hundred five thousand, six hundred eighty".