16897920 has 128 divisors (see below), whose sum is σ = 58091040. Its totient is φ = 4153344.

The previous prime is 16897913. The next prime is 16897963. The reversal of 16897920 is 2979861.

It is a tau number, because it is divible by the number of its divisors (128).

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, 24622 + ... + 25298.

Almost surely, 2^16897920 is an apocalyptic number.

16897920 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 16897920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29045520).

16897920 is an abundant number, since it is smaller than the sum of its proper divisors (41193120).

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

16897920 is a wasteful number, since it uses less digits than its factorization.

16897920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 16897920 is about 4110.7079682215. The cubic root of 16897920 is about 256.6124658325.

The spelling of 16897920 in words is "sixteen million, eight hundred ninety-seven thousand, nine hundred twenty".