16909830 has 128 divisors (see below), whose sum is σ = 53913600. Its totient is φ = 3687552.

The previous prime is 16909817. The next prime is 16909847. The reversal of 16909830 is 3890961.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43276 + ... + 43664.

It is an arithmetic number, because the mean of its divisors is an integer number (421200).

Almost surely, 2^16909830 is an apocalyptic number.

16909830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16909830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26956800).

16909830 is an abundant number, since it is smaller than the sum of its proper divisors (37003770).

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

16909830 is a wasteful number, since it uses less digits than its factorization.

16909830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 16909830 is about 4112.1563686222. The cubic root of 16909830 is about 256.6727402472.

The spelling of 16909830 in words is "sixteen million, nine hundred nine thousand, eight hundred thirty".