15391138 has 16 divisors (see below), whose sum is σ = 26478144. Its totient is φ = 6572880.

The previous prime is 15391133. The next prime is 15391151. The reversal of 15391138 is 83119351.

It is not an unprimeable number, because it can be changed into a prime (15391133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508 + ... + 6088.

It is an arithmetic number, because the mean of its divisors is an integer number (1654884).

Almost surely, 2^15391138 is an apocalyptic number.

15391138 is a deficient number, since it is larger than the sum of its proper divisors (11087006).

15391138 is a wasteful number, since it uses less digits than its factorization.

15391138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3897.

The product of its digits is 3240, while the sum is 31.

The square root of 15391138 is about 3923.1540882305. The cubic root of 15391138 is about 248.7464610660.

The spelling of 15391138 in words is "fifteen million, three hundred ninety-one thousand, one hundred thirty-eight".