16439423 has 24 divisors (see below), whose sum is σ = 22254624. Its totient is φ = 11816640.

The previous prime is 16439419. The next prime is 16439429. The reversal of 16439423 is 32493461.

It is not a de Polignac number, because 16439423 - 2² = 16439419 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16439423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16439429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10265 + ... + 11757.

It is an arithmetic number, because the mean of its divisors is an integer number (927276).

Almost surely, 2^16439423 is an apocalyptic number.

16439423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16439423 is a deficient number, since it is larger than the sum of its proper divisors (5815201).

16439423 is a wasteful number, since it uses less digits than its factorization.

16439423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1524 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 16439423 is about 4054.5558326406. Note that the first 3 decimals coincide. The cubic root of 16439423 is about 254.2702344326.

The spelling of 16439423 in words is "sixteen million, four hundred thirty-nine thousand, four hundred twenty-three".