328813831 has 4 divisors (see below), whose sum is σ = 330630664. Its totient is φ = 326997000.

The previous prime is 328813817. The next prime is 328813843. The reversal of 328813831 is 138318823.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 328813831 - 2⁷ = 328813703 is a prime.

It is a super-2 number, since 2×328813831² = 216237070913793122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328813231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908145 + ... + 908506.

It is an arithmetic number, because the mean of its divisors is an integer number (82657666).

Almost surely, 2^328813831 is an apocalyptic number.

328813831 is a deficient number, since it is larger than the sum of its proper divisors (1816833).

328813831 is a wasteful number, since it uses less digits than its factorization.

328813831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816832.

The product of its digits is 27648, while the sum is 37.

The square root of 328813831 is about 18133.2245064136. The cubic root of 328813831 is about 690.2133562711.

The spelling of 328813831 in words is "three hundred twenty-eight million, eight hundred thirteen thousand, eight hundred thirty-one".