328689056 has 72 divisors (see below), whose sum is σ = 702327780. Its totient is φ = 151289856.

The previous prime is 328689029. The next prime is 328689071. The reversal of 328689056 is 650986823.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 318979600 + 9709456 = 17860^2 + 3116^2 .

It is a super-2 number, since 2×328689056² = 216072991068342272, 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 328689056.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427040 + ... + 427808.

Almost surely, 2^328689056 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 328689056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351163890).

328689056 is an abundant number, since it is smaller than the sum of its proper divisors (373638724).

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

328689056 is a wasteful number, since it uses less digits than its factorization.

328689056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 328689056 is about 18129.7836721788. The cubic root of 328689056 is about 690.1260401272.

The spelling of 328689056 in words is "three hundred twenty-eight million, six hundred eighty-nine thousand, fifty-six".