13828565 has 16 divisors (see below), whose sum is σ = 18049392. Its totient is φ = 10128384.

The previous prime is 13828559. The next prime is 13828571. The reversal of 13828565 is 56582831.

It is an interprime number because it is at equal distance from previous prime (13828559) and next prime (13828571).

It can be written as a sum of positive squares in 8 ways, for example, as 1162084 + 12666481 = 1078^2 + 3559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13828565 is a prime.

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 947 + ... + 5343.

It is an arithmetic number, because the mean of its divisors is an integer number (1128087).

Almost surely, 2^13828565 is an apocalyptic number.

It is an amenable number.

13828565 is a deficient number, since it is larger than the sum of its proper divisors (4220827).

13828565 is a wasteful number, since it uses less digits than its factorization.

13828565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456.

The product of its digits is 57600, while the sum is 38.

The square root of 13828565 is about 3718.6778564431. The cubic root of 13828565 is about 240.0264149167.

The spelling of 13828565 in words is "thirteen million, eight hundred twenty-eight thousand, five hundred sixty-five".