16688946 has 8 divisors (see below), whose sum is σ = 33377904. Its totient is φ = 5562980.

The previous prime is 16688941. The next prime is 16688953. The reversal of 16688946 is 64988661.

It is a sphenic number, since it is the product of 3 distinct primes.

16688946 is an admirable number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 16688895 and 16688904.

It is not an unprimeable number, because it can be changed into a prime (16688941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390740 + ... + 1390751.

It is an arithmetic number, because the mean of its divisors is an integer number (4172238).

Almost surely, 2^16688946 is an apocalyptic number.

16688946 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16688946 is a wasteful number, since it uses less digits than its factorization.

16688946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781496.

The product of its digits is 497664, while the sum is 48.

The square root of 16688946 is about 4085.2106432839. The cubic root of 16688946 is about 255.5502458744.

The spelling of 16688946 in words is "sixteen million, six hundred eighty-eight thousand, nine hundred forty-six".