12811380 has 24 divisors (see below), whose sum is σ = 35872032. Its totient is φ = 3416352.

The previous prime is 12811373. The next prime is 12811397. The reversal of 12811380 is 8311821.

It is a self number, because there is not a number n which added to its sum of digits gives 12811380.

It is a congruent number.

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, 106702 + ... + 106821.

It is an arithmetic number, because the mean of its divisors is an integer number (1494668).

Almost surely, 2^12811380 is an apocalyptic number.

12811380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12811380 is an abundant number, since it is smaller than the sum of its proper divisors (23060652).

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

12811380 is a wasteful number, since it uses less digits than its factorization.

12811380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213535 (or 213533 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 12811380 is about 3579.2988140137. The cubic root of 12811380 is about 233.9907221100.

The spelling of 12811380 in words is "twelve million, eight hundred eleven thousand, three hundred eighty".