16378089 has 32 divisors (see below), whose sum is σ = 28465920.
Its totient is φ = 8128512.
The previous prime is 16378081. The next prime is 16378091. The reversal of 16378089 is 98087361.
It is not a de Polignac number, because 16378089 - 23 = 16378081 is a prime.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 16378089.
It is not an unprimeable number, because it can be changed into a prime (16378081) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2877 + ... + 6405.
It is an arithmetic number, because the mean of its divisors is an integer number (889560).
Almost surely, 216378089 is an apocalyptic number.
It is an amenable number.
16378089 is a deficient number, since it is larger than the sum of its proper divisors (12087831).
16378089 is a wasteful number, since it uses less digits than its factorization.
16378089 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3569.
The product of its (nonzero) digits is 72576, while the sum is 42.
The square root of 16378089 is about 4046.9851741760.
The cubic root of 16378089 is about 253.9536206057.
The spelling of 16378089 in words is "sixteen million, three hundred seventy-eight thousand, eighty-nine".