16109712 has 80 divisors (see below), whose sum is σ = 46872000. Its totient is φ = 5296896.

The previous prime is 16109711. The next prime is 16109741. The reversal of 16109712 is 21790161.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (16109711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38239 + ... + 38657.

It is an arithmetic number, because the mean of its divisors is an integer number (585900).

Almost surely, 2^16109712 is an apocalyptic number.

16109712 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 16109712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23436000).

16109712 is an abundant number, since it is smaller than the sum of its proper divisors (30762288).

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

16109712 is a wasteful number, since it uses less digits than its factorization.

16109712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 16109712 is about 4013.6905710331. The cubic root of 16109712 is about 252.5588504462.

Adding to 16109712 its reverse (21790161), we get a palindrome (37899873).

The spelling of 16109712 in words is "sixteen million, one hundred nine thousand, seven hundred twelve".