12317640 has 32 divisors (see below), whose sum is σ = 36953280. Its totient is φ = 3284672.

The previous prime is 12317623. The next prime is 12317647. The reversal of 12317640 is 4671321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12317640.

It is not an unprimeable number, because it can be changed into a prime (12317647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51204 + ... + 51443.

It is an arithmetic number, because the mean of its divisors is an integer number (1154790).

Almost surely, 2^12317640 is an apocalyptic number.

12317640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12317640 is an abundant number, since it is smaller than the sum of its proper divisors (24635640).

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

12317640 is a wasteful number, since it uses less digits than its factorization.

12317640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102661 (or 102657 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 12317640 is about 3509.6495551550. The cubic root of 12317640 is about 230.9453216662.

Adding to 12317640 its reverse (4671321), we get a palindrome (16988961).

The spelling of 12317640 in words is "twelve million, three hundred seventeen thousand, six hundred forty".