438290328 has 256 divisors, whose sum is σ = 1437004800. Its totient is φ = 108380160.

The previous prime is 438290327. The next prime is 438290339. The reversal of 438290328 is 823092834.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438290327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2224726 + ... + 2224922.

It is an arithmetic number, because the mean of its divisors is an integer number (5613300).

Almost surely, 2^438290328 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 438290328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718502400).

438290328 is an abundant number, since it is smaller than the sum of its proper divisors (998714472).

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

438290328 is a wasteful number, since it uses less digits than its factorization.

438290328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 438290328 is about 20935.3845916429. The cubic root of 438290328 is about 759.6040920405.

The spelling of 438290328 in words is "four hundred thirty-eight million, two hundred ninety thousand, three hundred twenty-eight".