16388139 has 8 divisors (see below), whose sum is σ = 21885840. Its totient is φ = 10907936.

The previous prime is 16388123. The next prime is 16388171. The reversal of 16388139 is 93188361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16388139 - 2⁴ = 16388123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16388097 and 16388106.

It is not an unprimeable number, because it can be changed into a prime (16388179) 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 7 ways as a sum of consecutive naturals, for example, 2004 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (2735730).

Almost surely, 2^16388139 is an apocalyptic number.

16388139 is a deficient number, since it is larger than the sum of its proper divisors (5497701).

16388139 is an equidigital number, since it uses as much as digits as its factorization.

16388139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8749.

The product of its digits is 31104, while the sum is 39.

The square root of 16388139 is about 4048.2266487933. The cubic root of 16388139 is about 254.0055540563.

The spelling of 16388139 in words is "sixteen million, three hundred eighty-eight thousand, one hundred thirty-nine".