328870386 has 48 divisors (see below), whose sum is σ = 772961280. Its totient is φ = 100452960.

The previous prime is 328870369. The next prime is 328870387. The reversal of 328870386 is 683078823.

It is not an unprimeable number, because it can be changed into a prime (328870387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27471 + ... + 37581.

It is an arithmetic number, because the mean of its divisors is an integer number (16103360).

Almost surely, 2^328870386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328870386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386480640).

328870386 is an abundant number, since it is smaller than the sum of its proper divisors (444090894).

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

328870386 is a wasteful number, since it uses less digits than its factorization.

328870386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271 (or 10268 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 328870386 is about 18134.7838696798. The cubic root of 328870386 is about 690.2529255501.

The spelling of 328870386 in words is "three hundred twenty-eight million, eight hundred seventy thousand, three hundred eighty-six".