16949688 has 128 divisors (see below), whose sum is σ = 51840000. Its totient is φ = 4609920.

The previous prime is 16949633. The next prime is 16949707. The reversal of 16949688 is 88694961.

It is a happy number.

It is a Cunningham number, because it is equal to 4117²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 16949688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238693 + ... + 238763.

It is an arithmetic number, because the mean of its divisors is an integer number (405000).

Almost surely, 2^16949688 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 16949688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25920000).

16949688 is an abundant number, since it is smaller than the sum of its proper divisors (34890312).

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

16949688 is a wasteful number, since it uses less digits than its factorization.

16949688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 112 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The square root of 16949688 is about 4116.9998785523. Note that the first 3 decimals coincide. The cubic root of 16949688 is about 256.8742489663.

The spelling of 16949688 in words is "sixteen million, nine hundred forty-nine thousand, six hundred eighty-eight".