16989385 has 8 divisors (see below), whose sum is σ = 23299776. Its totient is φ = 11649840.

The previous prime is 16989383. The next prime is 16989397. The reversal of 16989385 is 58398961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16989385 - 2¹ = 16989383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16989383) 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, 242671 + ... + 242740.

It is an arithmetic number, because the mean of its divisors is an integer number (2912472).

Almost surely, 2^16989385 is an apocalyptic number.

It is an amenable number.

16989385 is a deficient number, since it is larger than the sum of its proper divisors (6310391).

16989385 is an equidigital number, since it uses as much as digits as its factorization.

16989385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485423.

The product of its digits is 466560, while the sum is 49.

The square root of 16989385 is about 4121.8181667803. The cubic root of 16989385 is about 257.0746299737.

The spelling of 16989385 in words is "sixteen million, nine hundred eighty-nine thousand, three hundred eighty-five".