13401728 has 16 divisors (see below), whose sum is σ = 26699010. Its totient is φ = 6700800.

The previous prime is 13401719. The next prime is 13401737. The reversal of 13401728 is 82710431.

It is an interprime number because it is at equal distance from previous prime (13401719) and next prime (13401737).

It can be written as a sum of positive squares in only one way, i.e., 9684544 + 3717184 = 3112^2 + 1928^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 13401697 and 13401706.

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 as a sum of consecutive naturals, namely, 52223 + ... + 52478.

Almost surely, 2^13401728 is an apocalyptic number.

It is an amenable number.

13401728 is a deficient number, since it is larger than the sum of its proper divisors (13297282).

13401728 is an equidigital number, since it uses as much as digits as its factorization.

13401728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104715 (or 104703 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 13401728 is about 3660.8370627494. The cubic root of 13401728 is about 237.5309832155.

The spelling of 13401728 in words is "thirteen million, four hundred one thousand, seven hundred twenty-eight".