328666650 has 96 divisors (see below), whose sum is σ = 906275328. Its totient is φ = 78278400.

The previous prime is 328666649. The next prime is 328666687. The reversal of 328666650 is 56666823.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57732 + ... + 63168.

It is an arithmetic number, because the mean of its divisors is an integer number (9440368).

Almost surely, 2^328666650 is an apocalyptic number.

328666650 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 328666650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453137664).

328666650 is an abundant number, since it is smaller than the sum of its proper divisors (577608678).

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

328666650 is a wasteful number, since it uses less digits than its factorization.

328666650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496 (or 5491 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 328666650 is about 18129.1657281851. The cubic root of 328666650 is about 690.1103583198.

The spelling of 328666650 in words is "three hundred twenty-eight million, six hundred sixty-six thousand, six hundred fifty".