13256880 has 160 divisors (see below), whose sum is σ = 50663424. Its totient is φ = 2792448.

The previous prime is 13256879. The next prime is 13256897. The reversal of 13256880 is 8865231.

It is a happy number.

It is a Cunningham number, because it is equal to 3641²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21537 + ... + 22143.

Almost surely, 2^13256880 is an apocalyptic number.

13256880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13256880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25331712).

13256880 is an abundant number, since it is smaller than the sum of its proper divisors (37406544).

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

13256880 is a wasteful number, since it uses less digits than its factorization.

13256880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 13256880 is about 3640.9998626751. Note that the first 3 decimals coincide. The cubic root of 13256880 is about 236.6721240118.

The spelling of 13256880 in words is "thirteen million, two hundred fifty-six thousand, eight hundred eighty".