16909340 has 48 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 5763072.

The previous prime is 16909337. The next prime is 16909367. The reversal of 16909340 is 4390961.

It is a junction number, because it is equal to n+sod(n) for n = 16909297 and 16909306.

It is a congruent number.

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, 37436 + ... + 37884.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^16909340 is an apocalyptic number.

16909340 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 16909340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20412000).

16909340 is an abundant number, since it is smaller than the sum of its proper divisors (23914660).

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

16909340 is a wasteful number, since it uses less digits than its factorization.

16909340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16909340 is about 4112.0967887442. The cubic root of 16909340 is about 256.6702610017.

The spelling of 16909340 in words is "sixteen million, nine hundred nine thousand, three hundred forty".