12438340 has 24 divisors (see below), whose sum is σ = 26190360. Its totient is φ = 4962048.

The previous prime is 12438311. The next prime is 12438403. The reversal of 12438340 is 4383421.

It can be written as a sum of positive squares in 4 ways, for example, as 2553604 + 9884736 = 1598^2 + 3144^2 .

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, 10834 + ... + 11926.

It is an arithmetic number, because the mean of its divisors is an integer number (1091265).

Almost surely, 2^12438340 is an apocalyptic number.

12438340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12438340 is an abundant number, since it is smaller than the sum of its proper divisors (13752020).

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

12438340 is a wasteful number, since it uses less digits than its factorization.

12438340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1669 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 12438340 is about 3526.8030849482. The cubic root of 12438340 is about 231.6972120125.

The spelling of 12438340 in words is "twelve million, four hundred thirty-eight thousand, three hundred forty".