328438859640 has 128 divisors (see below), whose sum is σ = 1043704984320. Its totient is φ = 82397849600.

The previous prime is 328438859587. The next prime is 328438859659. The reversal of 328438859640 is 46958834823.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5131435 + ... + 5195045.

It is an arithmetic number, because the mean of its divisors is an integer number (8153945190).

Almost surely, 2^328438859640 is an apocalyptic number.

328438859640 is a gapful number since it is divisible by the number (30) 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 328438859640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521852492160).

328438859640 is an abundant number, since it is smaller than the sum of its proper divisors (715266124680).

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

328438859640 is a wasteful number, since it uses less digits than its factorization.

328438859640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66173 (or 66169 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 60.

The spelling of 328438859640 in words is "three hundred twenty-eight billion, four hundred thirty-eight million, eight hundred fifty-nine thousand, six hundred forty".