328220424 has 120 divisors (see below), whose sum is σ = 1069517790. Its totient is φ = 93768192.

The previous prime is 328220413. The next prime is 328220437. The reversal of 328220424 is 424022823.

It can be written as a sum of positive squares in only one way, i.e., 324648324 + 3572100 = 18018^2 + 1890^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 26584 + ... + 36920.

Almost surely, 2^328220424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328220424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534758895).

328220424 is an abundant number, since it is smaller than the sum of its proper divisors (741297366).

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

328220424 is a wasteful number, since it uses less digits than its factorization.

328220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10369 (or 10349 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 328220424 is about 18116.8546939031. The cubic root of 328220424 is about 689.7978992226.

The spelling of 328220424 in words is "three hundred twenty-eight million, two hundred twenty thousand, four hundred twenty-four".