328606261 has 4 divisors (see below), whose sum is σ = 328797612. Its totient is φ = 328414912.

The previous prime is 328606259. The next prime is 328606297. The reversal of 328606261 is 162606823.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95433361 + 233172900 = 9769^2 + 15270^2 .

It is a cyclic number.

It is not a de Polignac number, because 328606261 - 2¹ = 328606259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328606241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93076 + ... + 96541.

It is an arithmetic number, because the mean of its divisors is an integer number (82199403).

Almost surely, 2^328606261 is an apocalyptic number.

It is an amenable number.

328606261 is a deficient number, since it is larger than the sum of its proper divisors (191351).

328606261 is a wasteful number, since it uses less digits than its factorization.

328606261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191350.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 328606261 is about 18127.5001310164. The cubic root of 328606261 is about 690.0680889190.

The spelling of 328606261 in words is "three hundred twenty-eight million, six hundred six thousand, two hundred sixty-one".