326640356 has 24 divisors (see below), whose sum is σ = 655897536. Its totient is φ = 139428000.

The previous prime is 326640323. The next prime is 326640361. The reversal of 326640356 is 653046623.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16211 + ... + 30266.

It is an arithmetic number, because the mean of its divisors is an integer number (27329064).

Almost surely, 2^326640356 is an apocalyptic number.

It is an amenable number.

326640356 is an abundant number, since it is smaller than the sum of its proper divisors (329257180).

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

326640356 is a wasteful number, since it uses less digits than its factorization.

326640356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46739 (or 46737 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 326640356 is about 18073.1944049745. The cubic root of 326640356 is about 688.6892121059.

Adding to 326640356 its reverse (653046623), we get a palindrome (979686979).

The spelling of 326640356 in words is "three hundred twenty-six million, six hundred forty thousand, three hundred fifty-six".