16385805 has 12 divisors (see below), whose sum is σ = 28402140. Its totient is φ = 8739072.

The previous prime is 16385801. The next prime is 16385819. The reversal of 16385805 is 50858361.

16385805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9400356 + 6985449 = 3066^2 + 2643^2 .

It is not a de Polignac number, because 16385805 - 2² = 16385801 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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 16385805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16385801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182020 + ... + 182109.

It is an arithmetic number, because the mean of its divisors is an integer number (2366845).

Almost surely, 2^16385805 is an apocalyptic number.

16385805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16385805 is a deficient number, since it is larger than the sum of its proper divisors (12016335).

16385805 is a wasteful number, since it uses less digits than its factorization.

16385805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364140 (or 364137 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 16385805 is about 4047.9383641553. The cubic root of 16385805 is about 253.9934949871.

The spelling of 16385805 in words is "sixteen million, three hundred eighty-five thousand, eight hundred five".