328723381 has 8 divisors (see below), whose sum is σ = 388638720. Its totient is φ = 272046768.

The previous prime is 328723357. The next prime is 328723391. The reversal of 328723381 is 183327823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 328723381 - 2⁷ = 328723253 is a prime.

It is a super-2 number, since 2×328723381² = 216118122432142322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 328723381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328723321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809461 + ... + 809866.

It is an arithmetic number, because the mean of its divisors is an integer number (48579840).

Almost surely, 2^328723381 is an apocalyptic number.

It is an amenable number.

328723381 is a deficient number, since it is larger than the sum of its proper divisors (59915339).

328723381 is a wasteful number, since it uses less digits than its factorization.

328723381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619363.

The product of its digits is 48384, while the sum is 37.

The square root of 328723381 is about 18130.7302941718. The cubic root of 328723381 is about 690.1500625798.

The spelling of 328723381 in words is "three hundred twenty-eight million, seven hundred twenty-three thousand, three hundred eighty-one".