326405128 has 16 divisors (see below), whose sum is σ = 699439680. Its totient is φ = 139887888.

The previous prime is 326405087. The next prime is 326405129. The reversal of 326405128 is 821504623.

It is a self number, because there is not a number n which added to its sum of digits gives 326405128.

It is not an unprimeable number, because it can be changed into a prime (326405129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2914276 + ... + 2914387.

It is an arithmetic number, because the mean of its divisors is an integer number (43714980).

Almost surely, 2^326405128 is an apocalyptic number.

It is an amenable number.

326405128 is an abundant number, since it is smaller than the sum of its proper divisors (373034552).

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

326405128 is a wasteful number, since it uses less digits than its factorization.

326405128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828676 (or 5828672 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 326405128 is about 18066.6855842459. The cubic root of 326405128 is about 688.5238540027.

The spelling of 326405128 in words is "three hundred twenty-six million, four hundred five thousand, one hundred twenty-eight".