13278520 has 32 divisors (see below), whose sum is σ = 30909600. Its totient is φ = 5127808.

The previous prime is 13278497. The next prime is 13278563. The reversal of 13278520 is 2587231.

13278520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 4564 + ... + 6883.

It is an arithmetic number, because the mean of its divisors is an integer number (965925).

Almost surely, 2^13278520 is an apocalyptic number.

13278520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13278520 is an abundant number, since it is smaller than the sum of its proper divisors (17631080).

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

13278520 is a wasteful number, since it uses less digits than its factorization.

13278520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487 (or 11483 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 13278520 is about 3643.9703621188. The cubic root of 13278520 is about 236.8008320369.

The spelling of 13278520 in words is "thirteen million, two hundred seventy-eight thousand, five hundred twenty".