438343668 has 72 divisors (see below), whose sum is σ = 1272835200. Its totient is φ = 124597440.

The previous prime is 438343643. The next prime is 438343673. The reversal of 438343668 is 866343834.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45778 + ... + 54518.

Almost surely, 2^438343668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438343668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636417600).

438343668 is an abundant number, since it is smaller than the sum of its proper divisors (834491532).

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

438343668 is a wasteful number, since it uses less digits than its factorization.

438343668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957 (or 8952 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 438343668 is about 20936.6584726408. The cubic root of 438343668 is about 759.6349054353.

The spelling of 438343668 in words is "four hundred thirty-eight million, three hundred forty-three thousand, six hundred sixty-eight".