16138685 has 8 divisors (see below), whose sum is σ = 19388160. Its totient is φ = 12896464.

The previous prime is 16138669. The next prime is 16138687. The reversal of 16138685 is 58683161.

It is a happy number.

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 16138685 - 2⁴ = 16138669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16138687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6896 + ... + 8934.

It is an arithmetic number, because the mean of its divisors is an integer number (2423520).

Almost surely, 2^16138685 is an apocalyptic number.

It is an amenable number.

16138685 is a deficient number, since it is larger than the sum of its proper divisors (3249475).

16138685 is a wasteful number, since it uses less digits than its factorization.

16138685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3627.

The product of its digits is 34560, while the sum is 38.

The square root of 16138685 is about 4017.2982214419. The cubic root of 16138685 is about 252.7101671432.

The spelling of 16138685 in words is "sixteen million, one hundred thirty-eight thousand, six hundred eighty-five".