326385505 has 4 divisors (see below), whose sum is σ = 391662612. Its totient is φ = 261108400.

The previous prime is 326385491. The next prime is 326385541. The reversal of 326385505 is 505583623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505583623 = 6047 ⋅83609.

It can be written as a sum of positive squares in 2 ways, for example, as 167650704 + 158734801 = 12948^2 + 12599^2 .

It is not a de Polignac number, because 326385505 - 2⁷ = 326385377 is a prime.

It is a Duffinian 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, 32638546 + ... + 32638555.

It is an arithmetic number, because the mean of its divisors is an integer number (97915653).

Almost surely, 2^326385505 is an apocalyptic number.

It is an amenable number.

326385505 is a deficient number, since it is larger than the sum of its proper divisors (65277107).

326385505 is an equidigital number, since it uses as much as digits as its factorization.

326385505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65277106.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 326385505 is about 18066.1425046965. The cubic root of 326385505 is about 688.5100560430.

The spelling of 326385505 in words is "three hundred twenty-six million, three hundred eighty-five thousand, five hundred five".