13728377 has 6 divisors (see below), whose sum is σ = 14865822. Its totient is φ = 12672192.

The previous prime is 13728353. The next prime is 13728391. The reversal of 13728377 is 77382731.

It can be written as a sum of positive squares in 3 ways, for example, as 30976 + 13697401 = 176^2 + 3701^2 .

It is not a de Polignac number, because 13728377 - 2¹⁴ = 13711993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13728377.

It is not an unprimeable number, because it can be changed into a prime (13728577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40448 + ... + 40785.

It is an arithmetic number, because the mean of its divisors is an integer number (2477637).

Almost surely, 2^13728377 is an apocalyptic number.

It is an amenable number.

13728377 is a deficient number, since it is larger than the sum of its proper divisors (1137445).

13728377 is an equidigital number, since it uses as much as digits as its factorization.

13728377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81259 (or 81246 counting only the distinct ones).

The product of its digits is 49392, while the sum is 38.

The square root of 13728377 is about 3705.1824516480. The cubic root of 13728377 is about 239.4453453039.

The spelling of 13728377 in words is "thirteen million, seven hundred twenty-eight thousand, three hundred seventy-seven".