12380840 has 16 divisors (see below), whose sum is σ = 27856980. Its totient is φ = 4952320.

The previous prime is 12380821. The next prime is 12380843. The reversal of 12380840 is 4808321.

It can be written as a sum of positive squares in 2 ways, for example, as 12292036 + 88804 = 3506^2 + 298^2 .

It is not an unprimeable number, because it can be changed into a prime (12380843) 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 3 ways as a sum of consecutive naturals, for example, 154721 + ... + 154800.

Almost surely, 2^12380840 is an apocalyptic number.

12380840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12380840 is an abundant number, since it is smaller than the sum of its proper divisors (15476140).

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

12380840 is a wasteful number, since it uses less digits than its factorization.

12380840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309532 (or 309528 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 12380840 is about 3518.6417834159. The cubic root of 12380840 is about 231.3396302180.

The spelling of 12380840 in words is "twelve million, three hundred eighty thousand, eight hundred forty".