328970640 has 160 divisors (see below), whose sum is σ = 1055932416. Its totient is φ = 84672000.

The previous prime is 328970599. The next prime is 328970641. The reversal of 328970640 is 46079823.

It is not an unprimeable number, because it can be changed into a prime (328970641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1310515 + ... + 1310765.

Almost surely, 2^328970640 is an apocalyptic number.

328970640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328970640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (527966208).

328970640 is an abundant number, since it is smaller than the sum of its proper divisors (726961776).

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

328970640 is a wasteful number, since it uses less digits than its factorization.

328970640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 328970640 is about 18137.5477945614. The cubic root of 328970640 is about 690.3230581303.

The spelling of 328970640 in words is "three hundred twenty-eight million, nine hundred seventy thousand, six hundred forty".