12780336 has 40 divisors (see below), whose sum is σ = 33145200. Its totient is φ = 4243456.

The previous prime is 12780323. The next prime is 12780347. The reversal of 12780336 is 63308721.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21256 + ... + 21848.

It is an arithmetic number, because the mean of its divisors is an integer number (828630).

Almost surely, 2^12780336 is an apocalyptic number.

12780336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12780336 is an abundant number, since it is smaller than the sum of its proper divisors (20364864).

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

12780336 is a wasteful number, since it uses less digits than its factorization.

12780336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 12780336 is about 3574.9595801911. The cubic root of 12780336 is about 233.8015704036.

The spelling of 12780336 in words is "twelve million, seven hundred eighty thousand, three hundred thirty-six".