438211423 has 20 divisors (see below), whose sum is σ = 483917240. Its totient is φ = 396725472.

The previous prime is 438211391. The next prime is 438211439. The reversal of 438211423 is 324112834.

It is not a de Polignac number, because 438211423 - 2⁵ = 438211391 is a prime.

It is the 20934-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 438211391 and 438211400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438211453) by changing a digit.

It is a nontrivial repunit in base 20933.

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 19 ways as a sum of consecutive naturals, for example, 1913473 + ... + 1913701.

It is an arithmetic number, because the mean of its divisors is an integer number (24195862).

Almost surely, 2^438211423 is an apocalyptic number.

438211423 is a deficient number, since it is larger than the sum of its proper divisors (45705817).

438211423 is an frugal number, since it uses more digits than its factorization.

438211423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 309 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 438211423 is about 20933.5000179139. The cubic root of 438211423 is about 759.5585056988.

The spelling of 438211423 in words is "four hundred thirty-eight million, two hundred eleven thousand, four hundred twenty-three".