12328520 has 16 divisors (see below), whose sum is σ = 27739260. Its totient is φ = 4931392.

The previous prime is 12328517. The next prime is 12328531. The reversal of 12328520 is 2582321.

It can be written as a sum of positive squares in 2 ways, for example, as 12264004 + 64516 = 3502^2 + 254^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 154067 + ... + 154146.

Almost surely, 2^12328520 is an apocalyptic number.

12328520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12328520 is an abundant number, since it is smaller than the sum of its proper divisors (15410740).

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

12328520 is a wasteful number, since it uses less digits than its factorization.

12328520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308224 (or 308220 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 12328520 is about 3511.1992253360. The cubic root of 12328520 is about 231.0132985854.

The spelling of 12328520 in words is "twelve million, three hundred twenty-eight thousand, five hundred twenty".