12409340 has 12 divisors (see below), whose sum is σ = 26059656. Its totient is φ = 4963728.

The previous prime is 12409339. The next prime is 12409349. The reversal of 12409340 is 4390421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12409349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310214 + ... + 310253.

It is an arithmetic number, because the mean of its divisors is an integer number (2171638).

Almost surely, 2^12409340 is an apocalyptic number.

12409340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12409340 is an abundant number, since it is smaller than the sum of its proper divisors (13650316).

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

12409340 is a wasteful number, since it uses less digits than its factorization.

12409340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620476 (or 620474 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12409340 is about 3522.6893135785. The cubic root of 12409340 is about 231.5170044747.

Adding to 12409340 its reverse (4390421), we get a palindrome (16799761).

The spelling of 12409340 in words is "twelve million, four hundred nine thousand, three hundred forty".