328431 has 8 divisors (see below), whose sum is σ = 443520. Its totient is φ = 216152.

The previous prime is 328429. The next prime is 328439. The reversal of 328431 is 134823.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 328431 - 2¹ = 328429 is a prime.

It is a super-2 number, since 2×328431² = 215733843522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3⁹ + 2¹⁷ + 4² + 8³ + 3¹¹ + 1 .

It is a junction number, because it is equal to n+sod(n) for n = 328398 and 328407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 908.

It is an arithmetic number, because the mean of its divisors is an integer number (55440).

2³²⁸⁴³¹ is an apocalyptic number.

328431 is a deficient number, since it is larger than the sum of its proper divisors (115089).

328431 is a wasteful number, since it uses less digits than its factorization.

328431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405.

The product of its digits is 576, while the sum is 21.

The square root of 328431 is about 573.0889983240. The cubic root of 328431 is about 68.9945385301.

The spelling of 328431 in words is "three hundred twenty-eight thousand, four hundred thirty-one".