13739728 has 20 divisors (see below), whose sum is σ = 27341380. Its totient is φ = 6683904.

The previous prime is 13739683. The next prime is 13739729. The reversal of 13739728 is 82793731.

It can be written as a sum of positive squares in 2 ways, for example, as 11343424 + 2396304 = 3368^2 + 1548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13739729) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11013 + ... + 12196.

It is an arithmetic number, because the mean of its divisors is an integer number (1367069).

Almost surely, 2^13739728 is an apocalyptic number.

It is an amenable number.

13739728 is a deficient number, since it is larger than the sum of its proper divisors (13601652).

13739728 is a wasteful number, since it uses less digits than its factorization.

13739728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23254 (or 23248 counting only the distinct ones).

The product of its digits is 63504, while the sum is 40.

The square root of 13739728 is about 3706.7139085718. The cubic root of 13739728 is about 239.5113204581.

The spelling of 13739728 in words is "thirteen million, seven hundred thirty-nine thousand, seven hundred twenty-eight".