16408889 has 8 divisors (see below), whose sum is σ = 19358208. Its totient is φ = 13610880.

The previous prime is 16408883. The next prime is 16408891. The reversal of 16408889 is 98880461.

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 16408889 - 2¹² = 16404793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16408883) 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, 37592 + ... + 38025.

It is an arithmetic number, because the mean of its divisors is an integer number (2419776).

Almost surely, 2^16408889 is an apocalyptic number.

It is an amenable number.

16408889 is a deficient number, since it is larger than the sum of its proper divisors (2949319).

16408889 is an equidigital number, since it uses as much as digits as its factorization.

16408889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75655.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 16408889 is about 4050.7886886383. The cubic root of 16408889 is about 254.1127127018.

The spelling of 16408889 in words is "sixteen million, four hundred eight thousand, eight hundred eighty-nine".