326406181 has 8 divisors (see below), whose sum is σ = 332062328. Its totient is φ = 320760000.

The previous prime is 326406167. The next prime is 326406217. The reversal of 326406181 is 181604623.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1865956 + 324540225 = 1366^2 + 18015^2 .

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 326406181 - 2⁷ = 326406053 is a prime.

It is a super-2 number, since 2×326406181² = 213081989990009522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326406121) 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, 97231 + ... + 100531.

It is an arithmetic number, because the mean of its divisors is an integer number (41507791).

Almost surely, 2^326406181 is an apocalyptic number.

It is an amenable number.

326406181 is a deficient number, since it is larger than the sum of its proper divisors (5656147).

326406181 is a wasteful number, since it uses less digits than its factorization.

326406181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 326406181 is about 18066.7147262583. The cubic root of 326406181 is about 688.5245944065.

The spelling of 326406181 in words is "three hundred twenty-six million, four hundred six thousand, one hundred eighty-one".