12397812 has 48 divisors (see below), whose sum is σ = 33962880. Its totient is φ = 3445632.

The previous prime is 12397787. The next prime is 12397817. The reversal of 12397812 is 21879321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12397817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114 + ... + 5102.

It is an arithmetic number, because the mean of its divisors is an integer number (707560).

Almost surely, 2^12397812 is an apocalyptic number.

12397812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12397812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16981440).

12397812 is an abundant number, since it is smaller than the sum of its proper divisors (21565068).

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

12397812 is a wasteful number, since it uses less digits than its factorization.

12397812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040 (or 4038 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 12397812 is about 3521.0526835025. The cubic root of 12397812 is about 231.4452908861.

The spelling of 12397812 in words is "twelve million, three hundred ninety-seven thousand, eight hundred twelve".