12307720 has 16 divisors (see below), whose sum is σ = 27692460. Its totient is φ = 4923072.

The previous prime is 12307703. The next prime is 12307741. The reversal of 12307720 is 2770321.

12307720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11464996 + 842724 = 3386^2 + 918^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12307691 and 12307700.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153807 + ... + 153886.

Almost surely, 2^12307720 is an apocalyptic number.

12307720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12307720 is an abundant number, since it is smaller than the sum of its proper divisors (15384740).

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

12307720 is a wasteful number, since it uses less digits than its factorization.

12307720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307704 (or 307700 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 12307720 is about 3508.2360239870. The cubic root of 12307720 is about 230.8833078151.

The spelling of 12307720 in words is "twelve million, three hundred seven thousand, seven hundred twenty".