438320688 has 80 divisors (see below), whose sum is σ = 1229254656. Its totient is φ = 133781760.

The previous prime is 438320681. The next prime is 438320693. The reversal of 438320688 is 886023834.

It is not an unprimeable number, because it can be changed into a prime (438320681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76483 + ... + 82013.

Almost surely, 2^438320688 is an apocalyptic number.

438320688 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438320688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614627328).

438320688 is an abundant number, since it is smaller than the sum of its proper divisors (790933968).

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

438320688 is a wasteful number, since it uses less digits than its factorization.

438320688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5682 (or 5676 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 438320688 is about 20936.1096672710. The cubic root of 438320688 is about 759.6216306797.

The spelling of 438320688 in words is "four hundred thirty-eight million, three hundred twenty thousand, six hundred eighty-eight".