91648328 has 8 divisors (see below), whose sum is σ = 171840630. Its totient is φ = 45824160.

The previous prime is 91648327. The next prime is 91648339. The reversal of 91648328 is 82384619.

It can be written as a sum of positive squares in only one way, i.e., 71199844 + 20448484 = 8438^2 + 4522^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (91648327) 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 as a sum of consecutive naturals, namely, 5728013 + ... + 5728028.

Almost surely, 2^91648328 is an apocalyptic number.

It is an amenable number.

91648328 is a deficient number, since it is larger than the sum of its proper divisors (80192302).

91648328 is a wasteful number, since it uses less digits than its factorization.

91648328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11456047 (or 11456043 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 91648328 is about 9573.3133240274. The cubic root of 91648328 is about 450.8598014246.

The spelling of 91648328 in words is "ninety-one million, six hundred forty-eight thousand, three hundred twenty-eight".