16809960 has 64 divisors (see below), whose sum is σ = 51166080. Its totient is φ = 4417280.

The previous prime is 16809943. The next prime is 16809971. The reversal of 16809960 is 6990861.

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, 7534 + ... + 9506.

It is an arithmetic number, because the mean of its divisors is an integer number (799470).

Almost surely, 2^16809960 is an apocalyptic number.

16809960 is a gapful number since it is divisible by the number (10) 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 16809960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25583040).

16809960 is an abundant number, since it is smaller than the sum of its proper divisors (34356120).

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

16809960 is a wasteful number, since it uses less digits than its factorization.

16809960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 16809960 is about 4099.9951219483. The cubic root of 16809960 is about 256.1664363656.

The spelling of 16809960 in words is "sixteen million, eight hundred nine thousand, nine hundred sixty".