16998385 has 16 divisors (see below), whose sum is σ = 22298112. Its totient is φ = 12384000.

The previous prime is 16998383. The next prime is 16998389. The reversal of 16998385 is 58389961.

16998385 = 205² + 206² + ... + 390².

It is not a de Polignac number, because 16998385 - 2¹ = 16998383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16998383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591 + ... + 5860.

It is an arithmetic number, because the mean of its divisors is an integer number (1393632).

Almost surely, 2^16998385 is an apocalyptic number.

It is an amenable number.

16998385 is a deficient number, since it is larger than the sum of its proper divisors (5299727).

16998385 is a wasteful number, since it uses less digits than its factorization.

16998385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6504.

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

The square root of 16998385 is about 4122.9097734488. The cubic root of 16998385 is about 257.1200164163.

The spelling of 16998385 in words is "sixteen million, nine hundred ninety-eight thousand, three hundred eighty-five".