13628139 has 16 divisors (see below), whose sum is σ = 20954112. Its totient is φ = 7717248.

The previous prime is 13628137. The next prime is 13628171. The reversal of 13628139 is 93182631.

It is not a de Polignac number, because 13628139 - 2¹ = 13628137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13628137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499 + ... + 5244.

It is an arithmetic number, because the mean of its divisors is an integer number (1309632).

Almost surely, 2^13628139 is an apocalyptic number.

13628139 is a deficient number, since it is larger than the sum of its proper divisors (7325973).

13628139 is a wasteful number, since it uses less digits than its factorization.

13628139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5866.

The product of its digits is 7776, while the sum is 33.

The square root of 13628139 is about 3691.6309403839. The cubic root of 13628139 is about 238.8611496024.

The spelling of 13628139 in words is "thirteen million, six hundred twenty-eight thousand, one hundred thirty-nine".