328933638 has 24 divisors (see below), whose sum is σ = 777479976. Its totient is φ = 99676800.

The previous prime is 328933613. The next prime is 328933639. The reversal of 328933638 is 836339823.

328933638 is a `hidden beast` number, since 3 + 2 + 8 + 9 + 3 + 3 + 638 = 666.

328933638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 328933593 and 328933602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328933639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 830443 + ... + 830838.

It is an arithmetic number, because the mean of its divisors is an integer number (32394999).

Almost surely, 2^328933638 is an apocalyptic number.

328933638 is an abundant number, since it is smaller than the sum of its proper divisors (448546338).

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

328933638 is a wasteful number, since it uses less digits than its factorization.

328933638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661300 (or 1661297 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 328933638 is about 18136.5277272139. The cubic root of 328933638 is about 690.2971750793.

It can be divided in two parts, 3 and 28933638, that added together give a square (28933641 = 5379²).

The spelling of 328933638 in words is "three hundred twenty-eight million, nine hundred thirty-three thousand, six hundred thirty-eight".