328784220 has 72 divisors (see below), whose sum is σ = 1024287264. Its totient is φ = 85304448.

The previous prime is 328784179. The next prime is 328784243. The reversal of 328784220 is 22487823.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18024 + ... + 31343.

It is an arithmetic number, because the mean of its divisors is an integer number (14226212).

Almost surely, 2^328784220 is an apocalyptic number.

328784220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

328784220 is an abundant number, since it is smaller than the sum of its proper divisors (695503044).

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

328784220 is a wasteful number, since it uses less digits than its factorization.

328784220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49419 (or 49414 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 328784220 is about 18132.4080033513. The cubic root of 328784220 is about 690.1926368251.

The spelling of 328784220 in words is "three hundred twenty-eight million, seven hundred eighty-four thousand, two hundred twenty".