16509852 has 48 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 5407920.

The previous prime is 16509827. The next prime is 16509859. The reversal of 16509852 is 25890561.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16509859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5077 + ... + 7667.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^16509852 is an apocalyptic number.

16509852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16509852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21772800).

16509852 is an abundant number, since it is smaller than the sum of its proper divisors (27035748).

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

16509852 is a wasteful number, since it uses less digits than its factorization.

16509852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663 (or 2655 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 16509852 is about 4063.2317187185. The cubic root of 16509852 is about 254.6328279677.

The spelling of 16509852 in words is "sixteen million, five hundred nine thousand, eight hundred fifty-two".