91127808 has 128 divisors (see below), whose sum is σ = 272625600. Its totient is φ = 30081024.

The previous prime is 91127807. The next prime is 91127867. The reversal of 91127808 is 80872119.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91127807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884685 + ... + 884787.

Almost surely, 2^91127808 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 91127808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136312800).

91127808 is an abundant number, since it is smaller than the sum of its proper divisors (181497792).

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

91127808 is an equidigital number, since it uses as much as digits as its factorization.

91127808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 91127808 is about 9546.0886230958. The cubic root of 91127808 is about 450.0046221747.

The spelling of 91127808 in words is "ninety-one million, one hundred twenty-seven thousand, eight hundred eight".