91338128 has 20 divisors (see below), whose sum is σ = 202248960. Its totient is φ = 39144864.

The previous prime is 91338113. The next prime is 91338131. The reversal of 91338128 is 82183319.

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 3 ways as a sum of consecutive naturals, for example, 407648 + ... + 407871.

It is an arithmetic number, because the mean of its divisors is an integer number (10112448).

Almost surely, 2^91338128 is an apocalyptic number.

It is an amenable number.

91338128 is an abundant number, since it is smaller than the sum of its proper divisors (110910832).

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

91338128 is a wasteful number, since it uses less digits than its factorization.

91338128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815534 (or 815528 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 91338128 is about 9557.0983044018. The cubic root of 91338128 is about 450.3505548267.

The spelling of 91338128 in words is "ninety-one million, three hundred thirty-eight thousand, one hundred twenty-eight".