326391 has 8 divisors (see below), whose sum is σ = 468720. Its totient is φ = 200832.

The previous prime is 326369. The next prime is 326437. The reversal of 326391 is 193623.

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

It is not a de Polignac number, because 326391 - 2¹⁷ = 195319 is a prime.

326391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326351) 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, 4146 + ... + 4223.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2³²⁶³⁹¹ is an apocalyptic number.

326391 is a deficient number, since it is larger than the sum of its proper divisors (142329).

326391 is a wasteful number, since it uses less digits than its factorization.

326391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8385.

The product of its digits is 972, while the sum is 24.

The square root of 326391 is about 571.3063976537. The cubic root of 326391 is about 68.8513919921.

It can be divided in two parts, 32639 and 1, that added together give a triangular number (32640 = T₂₅₅).

The spelling of 326391 in words is "three hundred twenty-six thousand, three hundred ninety-one".