328213660 has 12 divisors (see below), whose sum is σ = 689248728. Its totient is φ = 131285456.

The previous prime is 328213649. The next prime is 328213661. The reversal of 328213660 is 66312823.

It is a super-2 number, since 2×328213660² = 215448413221191200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328213661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8205322 + ... + 8205361.

It is an arithmetic number, because the mean of its divisors is an integer number (57437394).

Almost surely, 2^328213660 is an apocalyptic number.

It is an amenable number.

328213660 is an abundant number, since it is smaller than the sum of its proper divisors (361035068).

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

328213660 is a wasteful number, since it uses less digits than its factorization.

328213660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16410692 (or 16410690 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 328213660 is about 18116.6680159460. The cubic root of 328213660 is about 689.7931607149.

It can be divided in two parts, 32821 and 3660, that added together give a square (36481 = 191²).

The spelling of 328213660 in words is "three hundred twenty-eight million, two hundred thirteen thousand, six hundred sixty".