16685772 has 48 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 5198080.

The previous prime is 16685761. The next prime is 16685777. The reversal of 16685772 is 27758661.

It is not an unprimeable number, because it can be changed into a prime (16685777) 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, 53497 + ... + 53807.

It is an arithmetic number, because the mean of its divisors is an integer number (864864).

Almost surely, 2^16685772 is an apocalyptic number.

16685772 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 16685772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20756736).

16685772 is an abundant number, since it is smaller than the sum of its proper divisors (24827700).

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

16685772 is a wasteful number, since it uses less digits than its factorization.

16685772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598 (or 596 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 16685772 is about 4084.8221503512. The cubic root of 16685772 is about 255.5340441741.

The spelling of 16685772 in words is "sixteen million, six hundred eighty-five thousand, seven hundred seventy-two".