328821132 has 12 divisors (see below), whose sum is σ = 767249336. Its totient is φ = 109607040.

The previous prime is 328821131. The next prime is 328821137. The reversal of 328821132 is 231128823.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×328821132² = 216246673699522848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 328821132.

It is not an unprimeable number, because it can be changed into a prime (328821131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13700869 + ... + 13700892.

Almost surely, 2^328821132 is an apocalyptic number.

It is an amenable number.

328821132 is an abundant number, since it is smaller than the sum of its proper divisors (438428204).

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

328821132 is a wasteful number, since it uses less digits than its factorization.

328821132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27401768 (or 27401766 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 328821132 is about 18133.4258208426. The cubic root of 328821132 is about 690.2184647448.

Adding to 328821132 its reverse (231128823), we get a palindrome (559949955).

The spelling of 328821132 in words is "three hundred twenty-eight million, eight hundred twenty-one thousand, one hundred thirty-two".