16405323 has 16 divisors (see below), whose sum is σ = 25266816. Its totient is φ = 9357440.

The previous prime is 16405313. The next prime is 16405343. The reversal of 16405323 is 32350461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16405323 - 2⁴ = 16405307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16405293 and 16405302.

It is not an unprimeable number, because it can be changed into a prime (16405313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14061 + ... + 15182.

It is an arithmetic number, because the mean of its divisors is an integer number (1579176).

Almost surely, 2^16405323 is an apocalyptic number.

16405323 is a deficient number, since it is larger than the sum of its proper divisors (8861493).

16405323 is a wasteful number, since it uses less digits than its factorization.

16405323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29274.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 16405323 is about 4050.3485035241. The cubic root of 16405323 is about 254.0943033387.

Adding to 16405323 its reverse (32350461), we get a palindrome (48755784).

The spelling of 16405323 in words is "sixteen million, four hundred five thousand, three hundred twenty-three".