16928005 has 8 divisors (see below), whose sum is σ = 21508632. Its totient is φ = 12745728.

The previous prime is 16927991. The next prime is 16928011. The reversal of 16928005 is 50082961.

It can be written as a sum of positive squares in 4 ways, for example, as 5678689 + 11249316 = 2383^2 + 3354^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16928005 - 2⁵ = 16927973 is a prime.

It is a super-3 number, since 3×16928005³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99492 + ... + 99661.

It is an arithmetic number, because the mean of its divisors is an integer number (2688579).

Almost surely, 2^16928005 is an apocalyptic number.

It is an amenable number.

16928005 is a deficient number, since it is larger than the sum of its proper divisors (4580627).

16928005 is a wasteful number, since it uses less digits than its factorization.

16928005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199175.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 16928005 is about 4114.3656862267. The cubic root of 16928005 is about 256.7646661999.

The spelling of 16928005 in words is "sixteen million, nine hundred twenty-eight thousand, five".