91750128 has 80 divisors (see below), whose sum is σ = 253483776. Its totient is φ = 28526080.

The previous prime is 91750091. The next prime is 91750129. The reversal of 91750128 is 82105719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91750129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44251 + ... + 46277.

Almost surely, 2^91750128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91750128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126741888).

91750128 is an abundant number, since it is smaller than the sum of its proper divisors (161733648).

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

91750128 is a wasteful number, since it uses less digits than its factorization.

91750128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 91750128 is about 9578.6287118773. The cubic root of 91750128 is about 451.0266731520.

The spelling of 91750128 in words is "ninety-one million, seven hundred fifty thousand, one hundred twenty-eight".