328861290 has 64 divisors (see below), whose sum is σ = 812094336. Its totient is φ = 85193472.

The previous prime is 328861289. The next prime is 328861297. The reversal of 328861290 is 92168823.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (328861297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169164 + ... + 171096.

It is an arithmetic number, because the mean of its divisors is an integer number (12688974).

Almost surely, 2^328861290 is an apocalyptic number.

328861290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 328861290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406047168).

328861290 is an abundant number, since it is smaller than the sum of its proper divisors (483233046).

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

328861290 is a wasteful number, since it uses less digits than its factorization.

328861290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 328861290 is about 18134.5330791835. The cubic root of 328861290 is about 690.2465617476.

The spelling of 328861290 in words is "three hundred twenty-eight million, eight hundred sixty-one thousand, two hundred ninety".