12756840 has 32 divisors (see below), whose sum is σ = 38270880. Its totient is φ = 3401792.

The previous prime is 12756833. The next prime is 12756871. The reversal of 12756840 is 4865721.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53034 + ... + 53273.

It is an arithmetic number, because the mean of its divisors is an integer number (1195965).

Almost surely, 2^12756840 is an apocalyptic number.

12756840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12756840 is an abundant number, since it is smaller than the sum of its proper divisors (25514040).

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

12756840 is a wasteful number, since it uses less digits than its factorization.

12756840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106321 (or 106317 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 12756840 is about 3571.6718774266. The cubic root of 12756840 is about 233.6582050651.

The spelling of 12756840 in words is "twelve million, seven hundred fifty-six thousand, eight hundred forty".