328831 has 12 divisors (see below), whose sum is σ = 376272. Its totient is φ = 285824.

The previous prime is 328829. The next prime is 328837. The reversal of 328831 is 138823.

328831 = 61² + 62² + ... + 106².

It is not a de Polignac number, because 328831 - 2¹ = 328829 is a prime.

It is a super-2 number, since 2×328831² = 216259653122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328796 and 328805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11325 + ... + 11353.

It is an arithmetic number, because the mean of its divisors is an integer number (31356).

2³²⁸⁸³¹ is an apocalyptic number.

328831 is a deficient number, since it is larger than the sum of its proper divisors (47441).

328831 is a wasteful number, since it uses less digits than its factorization.

328831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 69 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 328831 is about 573.4378780653. The cubic root of 328831 is about 69.0225369216.

The spelling of 328831 in words is "three hundred twenty-eight thousand, eight hundred thirty-one".