13256780 has 12 divisors (see below), whose sum is σ = 27839280. Its totient is φ = 5302704.

The previous prime is 13256777. The next prime is 13256797. The reversal of 13256780 is 8765231.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331400 + ... + 331439.

It is an arithmetic number, because the mean of its divisors is an integer number (2319940).

Almost surely, 2^13256780 is an apocalyptic number.

13256780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13256780 is an abundant number, since it is smaller than the sum of its proper divisors (14582500).

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

13256780 is a wasteful number, since it uses less digits than its factorization.

13256780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662848 (or 662846 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 13256780 is about 3640.9861301576. The cubic root of 13256780 is about 236.6715289177.

The spelling of 13256780 in words is "thirteen million, two hundred fifty-six thousand, seven hundred eighty".