326728 has 8 divisors (see below), whose sum is σ = 612630. Its totient is φ = 163360.

The previous prime is 326707. The next prime is 326737. The reversal of 326728 is 827623.

It can be written as a sum of positive squares in only one way, i.e., 209764 + 116964 = 458^2 + 342^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a d-powerful number, because it can be written as 3⁴ + 2⁴ + 7⁵ + 6⁶ + 2¹⁰ + 8⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 326696 and 326705.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20413 + ... + 20428.

2³²⁶⁷²⁸ is an apocalyptic number.

It is an amenable number.

326728 is a deficient number, since it is larger than the sum of its proper divisors (285902).

326728 is a wasteful number, since it uses less digits than its factorization.

326728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40847 (or 40843 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 326728 is about 571.6012596207. The cubic root of 326728 is about 68.8750802862.

It can be divided in two parts, 32 and 6728, that multiplied together give a square (215296 = 464²).

The spelling of 326728 in words is "three hundred twenty-six thousand, seven hundred twenty-eight".