326991948 has 12 divisors (see below), whose sum is σ = 762981240. Its totient is φ = 108997312.

The previous prime is 326991941. The next prime is 326991949. The reversal of 326991948 is 849199623.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 326991948.

It is not an unprimeable number, because it can be changed into a prime (326991941) 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, 13624653 + ... + 13624676.

It is an arithmetic number, because the mean of its divisors is an integer number (63581770).

Almost surely, 2^326991948 is an apocalyptic number.

It is an amenable number.

326991948 is an abundant number, since it is smaller than the sum of its proper divisors (435989292).

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

326991948 is a wasteful number, since it uses less digits than its factorization.

326991948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27249336 (or 27249334 counting only the distinct ones).

The product of its digits is 839808, while the sum is 51.

The square root of 326991948 is about 18082.9186803458. The cubic root of 326991948 is about 688.9362226042.

The spelling of 326991948 in words is "three hundred twenty-six million, nine hundred ninety-one thousand, nine hundred forty-eight".