438213438 has 48 divisors (see below), whose sum is σ = 1028860560. Its totient is φ = 133996032.

The previous prime is 438213409. The next prime is 438213439. The reversal of 438213438 is 834312834.

It is a happy number.

438213438 is a `hidden beast` number, since 4 + 3 + 8 + 213 + 438 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438213439) 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, 32398 + ... + 43886.

It is an arithmetic number, because the mean of its divisors is an integer number (21434595).

Almost surely, 2^438213438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438213438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514430280).

438213438 is an abundant number, since it is smaller than the sum of its proper divisors (590647122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438213438 is a wasteful number, since it uses less digits than its factorization.

438213438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11673 (or 11670 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 438213438 is about 20933.5481464562. The cubic root of 438213438 is about 759.5596699070.

The spelling of 438213438 in words is "four hundred thirty-eight million, two hundred thirteen thousand, four hundred thirty-eight".