438628432 has 40 divisors (see below), whose sum is σ = 931235040. Its totient is φ = 198487680.

The previous prime is 438628427. The next prime is 438628439. The reversal of 438628432 is 234826834.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438628439) 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 7 ways as a sum of consecutive naturals, for example, 34863 + ... + 45745.

It is an arithmetic number, because the mean of its divisors is an integer number (23280876).

Almost surely, 2^438628432 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 438628432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (465617520).

438628432 is an abundant number, since it is smaller than the sum of its proper divisors (492606608).

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

438628432 is a wasteful number, since it uses less digits than its factorization.

438628432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131 (or 11125 counting only the distinct ones).

The product of its digits is 221184, while the sum is 40.

The square root of 438628432 is about 20943.4579761796. The cubic root of 438628432 is about 759.7993653211.

The spelling of 438628432 in words is "four hundred thirty-eight million, six hundred twenty-eight thousand, four hundred thirty-two".