16943904 has 72 divisors (see below), whose sum is σ = 49991760. Its totient is φ = 5645376.

The previous prime is 16943881. The next prime is 16943921. The reversal of 16943904 is 40934961.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×16943904² = 574191765522432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6687 + ... + 8865.

It is an arithmetic number, because the mean of its divisors is an integer number (694330).

Almost surely, 2^16943904 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 16943904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24995880).

16943904 is an abundant number, since it is smaller than the sum of its proper divisors (33047856).

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

16943904 is an equidigital number, since it uses as much as digits as its factorization.

16943904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 2184 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 16943904 is about 4116.2973653515. The cubic root of 16943904 is about 256.8450266055.

The spelling of 16943904 in words is "sixteen million, nine hundred forty-three thousand, nine hundred four".