16390423 has 16 divisors (see below), whose sum is σ = 19514880. Its totient is φ = 13468896.

The previous prime is 16390417. The next prime is 16390427. The reversal of 16390423 is 32409361.

It is not a de Polignac number, because 16390423 - 2⁵ = 16390391 is a prime.

It is a super-2 number, since 2×16390423² = 537291932237858, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16390391 and 16390400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16390427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53236 + ... + 53542.

It is an arithmetic number, because the mean of its divisors is an integer number (1219680).

Almost surely, 2^16390423 is an apocalyptic number.

16390423 is a deficient number, since it is larger than the sum of its proper divisors (3124457).

16390423 is a wasteful number, since it uses less digits than its factorization.

16390423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 16390423 is about 4048.5087377947. The cubic root of 16390423 is about 254.0173536824.

Adding to 16390423 its reverse (32409361), we get a palindrome (48799784).

The spelling of 16390423 in words is "sixteen million, three hundred ninety thousand, four hundred twenty-three".