328919730 has 16 divisors (see below), whose sum is σ = 789407424. Its totient is φ = 87711920.

The previous prime is 328919729. The next prime is 328919741. The reversal of 328919730 is 37919823.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5481966 + ... + 5482025.

It is an arithmetic number, because the mean of its divisors is an integer number (49337964).

Almost surely, 2^328919730 is an apocalyptic number.

328919730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

328919730 is an abundant number, since it is smaller than the sum of its proper divisors (460487694).

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

328919730 is a wasteful number, since it uses less digits than its factorization.

328919730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10964001.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 328919730 is about 18136.1442980585. The cubic root of 328919730 is about 690.2874458743.

The spelling of 328919730 in words is "three hundred twenty-eight million, nine hundred nineteen thousand, seven hundred thirty".