12855380 has 12 divisors (see below), whose sum is σ = 26996340. Its totient is φ = 5142144.

The previous prime is 12855377. The next prime is 12855389. The reversal of 12855380 is 8355821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1592644 + 11262736 = 1262^2 + 3356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12855389) 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, 321365 + ... + 321404.

It is an arithmetic number, because the mean of its divisors is an integer number (2249695).

Almost surely, 2^12855380 is an apocalyptic number.

12855380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12855380 is an abundant number, since it is smaller than the sum of its proper divisors (14140960).

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

12855380 is a wasteful number, since it uses less digits than its factorization.

12855380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642778 (or 642776 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 12855380 is about 3585.4400008925. The cubic root of 12855380 is about 234.2582922354.

The spelling of 12855380 in words is "twelve million, eight hundred fifty-five thousand, three hundred eighty".