326720 has 28 divisors (see below), whose sum is σ = 778764. Its totient is φ = 130560.

The previous prime is 326707. The next prime is 326737. The reversal of 326720 is 27623.

326720 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 2 ways, for example, as 153664 + 173056 = 392^2 + 416^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 326692 and 326701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191 + ... + 830.

It is an arithmetic number, because the mean of its divisors is an integer number (27813).

2³²⁶⁷²⁰ is an apocalyptic number.

It is an amenable number.

326720 is an abundant number, since it is smaller than the sum of its proper divisors (452044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

326720 is a wasteful number, since it uses less digits than its factorization.

326720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 326720 is about 571.5942616927. The cubic root of 326720 is about 68.8745181416.

The spelling of 326720 in words is "three hundred twenty-six thousand, seven hundred twenty".