16904305 has 12 divisors (see below), whose sum is σ = 22297716. Its totient is φ = 12293600.

The previous prime is 16904263. The next prime is 16904309. The reversal of 16904305 is 50340961.

It can be written as a sum of positive squares in 2 ways, for example, as 7144929 + 9759376 = 2673^2 + 3124^2 .

It is not a de Polignac number, because 16904305 - 2⁹ = 16903793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16904309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13366 + ... + 14575.

It is an arithmetic number, because the mean of its divisors is an integer number (1858143).

Almost surely, 2^16904305 is an apocalyptic number.

It is an amenable number.

16904305 is a deficient number, since it is larger than the sum of its proper divisors (5393411).

16904305 is a wasteful number, since it uses less digits than its factorization.

16904305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27968 (or 27957 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 16904305 is about 4111.4845250834. The cubic root of 16904305 is about 256.6447827147.

It can be divided in two parts, 1690 and 4305, that added together give a palindrome (5995).

The spelling of 16904305 in words is "sixteen million, nine hundred four thousand, three hundred five".