328685238 has 96 divisors (see below), whose sum is σ = 838656000. Its totient is φ = 92991024.

The previous prime is 328685221. The next prime is 328685239. The reversal of 328685238 is 832586823.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 328685193 and 328685202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328685239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 857995 + ... + 858377.

It is an arithmetic number, because the mean of its divisors is an integer number (8736000).

Almost surely, 2^328685238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328685238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419328000).

328685238 is an abundant number, since it is smaller than the sum of its proper divisors (509970762).

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

328685238 is a wasteful number, since it uses less digits than its factorization.

328685238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 534 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 328685238 is about 18129.6783755256. The cubic root of 328685238 is about 690.1233679853.

The spelling of 328685238 in words is "three hundred twenty-eight million, six hundred eighty-five thousand, two hundred thirty-eight".