16385850 has 72 divisors (see below), whose sum is σ = 47426652. Its totient is φ = 4032000.

The previous prime is 16385849. The next prime is 16385891. The reversal of 16385850 is 5858361.

16385850 = 42² + 43² + ... + 366².

It can be written as a sum of positive squares in 6 ways, for example, as 3143529 + 13242321 = 1773^2 + 3639^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4450 + ... + 7250.

Almost surely, 2^16385850 is an apocalyptic number.

16385850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16385850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23713326).

16385850 is an abundant number, since it is smaller than the sum of its proper divisors (31040802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16385850 is a wasteful number, since it uses less digits than its factorization.

16385850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832 (or 2824 counting only the distinct ones).

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

The square root of 16385850 is about 4047.9439225365. The cubic root of 16385850 is about 253.9937274992.

The spelling of 16385850 in words is "sixteen million, three hundred eighty-five thousand, eight hundred fifty".