13728840 has 32 divisors (see below), whose sum is σ = 41186880. Its totient is φ = 3660992.

The previous prime is 13728823. The next prime is 13728881. The reversal of 13728840 is 4882731.

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, 57084 + ... + 57323.

It is an arithmetic number, because the mean of its divisors is an integer number (1287090).

Almost surely, 2^13728840 is an apocalyptic number.

13728840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13728840 is an abundant number, since it is smaller than the sum of its proper divisors (27458040).

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

13728840 is a wasteful number, since it uses less digits than its factorization.

13728840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114421 (or 114417 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 13728840 is about 3705.2449311753. The cubic root of 13728840 is about 239.4480370994.

The spelling of 13728840 in words is "thirteen million, seven hundred twenty-eight thousand, eight hundred forty".