12380240 has 20 divisors (see below), whose sum is σ = 28784244. Its totient is φ = 4952064.

The previous prime is 12380231. The next prime is 12380257. The reversal of 12380240 is 4208321.

It can be written as a sum of positive squares in 2 ways, for example, as 9024016 + 3356224 = 3004^2 + 1832^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 77297 + ... + 77456.

Almost surely, 2^12380240 is an apocalyptic number.

12380240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12380240 is an abundant number, since it is smaller than the sum of its proper divisors (16404004).

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

12380240 is a wasteful number, since it uses less digits than its factorization.

12380240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154766 (or 154760 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 12380240 is about 3518.5565222119. The cubic root of 12380240 is about 231.3358930989.

Adding to 12380240 its reverse (4208321), we get a palindrome (16588561).

The spelling of 12380240 in words is "twelve million, three hundred eighty thousand, two hundred forty".