16388869 has 8 divisors (see below), whose sum is σ = 18906048. Its totient is φ = 13915680.

The previous prime is 16388851. The next prime is 16388881. The reversal of 16388869 is 96888361.

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 16388869 - 2⁵ = 16388837 is a prime.

It is a super-2 number, since 2×16388869² = 537190054198322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16388569) 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, 10192 + ... + 11689.

It is an arithmetic number, because the mean of its divisors is an integer number (2363256).

Almost surely, 2^16388869 is an apocalyptic number.

It is an amenable number.

16388869 is a deficient number, since it is larger than the sum of its proper divisors (2517179).

16388869 is a wasteful number, since it uses less digits than its factorization.

16388869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21995.

The product of its digits is 497664, while the sum is 49.

The square root of 16388869 is about 4048.3168107252. The cubic root of 16388869 is about 254.0093255096.

The spelling of 16388869 in words is "sixteen million, three hundred eighty-eight thousand, eight hundred sixty-nine".