16778316 has 96 divisors (see below), whose sum is σ = 44126208. Its totient is φ = 4942080.

The previous prime is 16778309. The next prime is 16778357. The reversal of 16778316 is 61387761.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316546 + ... + 316598.

It is an arithmetic number, because the mean of its divisors is an integer number (459648).

Almost surely, 2^16778316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16778316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22063104).

16778316 is an abundant number, since it is smaller than the sum of its proper divisors (27347892).

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

16778316 is a wasteful number, since it uses less digits than its factorization.

16778316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 149 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 16778316 is about 4096.1342751428. The cubic root of 16778316 is about 256.0055947671.

The spelling of 16778316 in words is "sixteen million, seven hundred seventy-eight thousand, three hundred sixteen".