16388769 has 4 divisors (see below), whose sum is σ = 21851696. Its totient is φ = 10925844.

The previous prime is 16388753. The next prime is 16388777. The reversal of 16388769 is 96788361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16388769 - 2⁴ = 16388753 is a prime.

It is a super-2 number, since 2×16388769² = 537183498670722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16388789) 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 3 ways as a sum of consecutive naturals, for example, 2731459 + ... + 2731464.

It is an arithmetic number, because the mean of its divisors is an integer number (5462924).

Almost surely, 2^16388769 is an apocalyptic number.

It is an amenable number.

16388769 is a deficient number, since it is larger than the sum of its proper divisors (5462927).

16388769 is an equidigital number, since it uses as much as digits as its factorization.

16388769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5462926.

The product of its digits is 435456, while the sum is 48.

The square root of 16388769 is about 4048.3044598943. The cubic root of 16388769 is about 254.0088088788.

The spelling of 16388769 in words is "sixteen million, three hundred eighty-eight thousand, seven hundred sixty-nine".