16985385 has 24 divisors (see below), whose sum is σ = 30723264. Its totient is φ = 8664480.

The previous prime is 16985327. The next prime is 16985399. The reversal of 16985385 is 58358961.

It is not a de Polignac number, because 16985385 - 2⁶ = 16985321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 16985385.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7171 + ... + 9240.

It is an arithmetic number, because the mean of its divisors is an integer number (1280136).

Almost surely, 2^16985385 is an apocalyptic number.

16985385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16985385 is a deficient number, since it is larger than the sum of its proper divisors (13737879).

16985385 is a wasteful number, since it uses less digits than its factorization.

16985385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16445 (or 16442 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 16985385 is about 4121.3329154534. The cubic root of 16985385 is about 257.0544530763.

The spelling of 16985385 in words is "sixteen million, nine hundred eighty-five thousand, three hundred eighty-five".