16000438 has 4 divisors (see below), whose sum is σ = 24000660. Its totient is φ = 8000218.

The previous prime is 16000409. The next prime is 16000447. The reversal of 16000438 is 83400061.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4000108 + ... + 4000111.

It is an arithmetic number, because the mean of its divisors is an integer number (6000165).

Almost surely, 2^16000438 is an apocalyptic number.

16000438 is a deficient number, since it is larger than the sum of its proper divisors (8000222).

16000438 is an equidigital number, since it uses as much as digits as its factorization.

16000438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8000221.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16000438 is about 4000.0547496253. The cubic root of 16000438 is about 251.9865093139.

Adding to 16000438 its reverse (83400061), we get a palindrome (99400499).

The spelling of 16000438 in words is "sixteen million, four hundred thirty-eight", and thus it is an aban number.