16690856 has 64 divisors (see below), whose sum is σ = 39070080. Its totient is φ = 6508800.

The previous prime is 16690829. The next prime is 16690897. The reversal of 16690856 is 65809661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73415 + ... + 73641.

It is an arithmetic number, because the mean of its divisors is an integer number (610470).

Almost surely, 2^16690856 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 16690856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19535040).

16690856 is an abundant number, since it is smaller than the sum of its proper divisors (22379224).

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

16690856 is a wasteful number, since it uses less digits than its factorization.

16690856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 16690856 is about 4085.4444066711. Note that the first 4 decimals coincide. The cubic root of 16690856 is about 255.5599944899.

The spelling of 16690856 in words is "sixteen million, six hundred ninety thousand, eight hundred fifty-six".