15338138 has 4 divisors (see below), whose sum is σ = 23007210. Its totient is φ = 7669068.

The previous prime is 15338123. The next prime is 15338173. The reversal of 15338138 is 83183351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15311569 + 26569 = 3913^2 + 163^2 .

It is a Curzon 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 as a sum of consecutive naturals, namely, 3834533 + ... + 3834536.

Almost surely, 2^15338138 is an apocalyptic number.

15338138 is a deficient number, since it is larger than the sum of its proper divisors (7669072).

15338138 is an equidigital number, since it uses as much as digits as its factorization.

15338138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7669071.

The product of its digits is 8640, while the sum is 32.

The square root of 15338138 is about 3916.3934940197. The cubic root of 15338138 is about 248.4606099014.

The spelling of 15338138 in words is "fifteen million, three hundred thirty-eight thousand, one hundred thirty-eight".