16947216 has 120 divisors (see below), whose sum is σ = 55788096. Its totient is φ = 4734720.

The previous prime is 16947209. The next prime is 16947233. The reversal of 16947216 is 61274961.

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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20181 + ... + 21003.

Almost surely, 2^16947216 is an apocalyptic number.

16947216 is a gapful number since it is divisible by the number (16) 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 16947216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27894048).

16947216 is an abundant number, since it is smaller than the sum of its proper divisors (38840880).

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

16947216 is a wasteful number, since it uses less digits than its factorization.

16947216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 852 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 16947216 is about 4116.6996489907. The cubic root of 16947216 is about 256.8617605551.

The spelling of 16947216 in words is "sixteen million, nine hundred forty-seven thousand, two hundred sixteen".