91128022 has 8 divisors (see below), whose sum is σ = 138933072. Its totient is φ = 44817000.

The previous prime is 91127999. The next prime is 91128029. The reversal of 91128022 is 22082119.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91128029) 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, 373354 + ... + 373597.

It is an arithmetic number, because the mean of its divisors is an integer number (17366634).

Almost surely, 2^91128022 is an apocalyptic number.

91128022 is a deficient number, since it is larger than the sum of its proper divisors (47805050).

91128022 is a wasteful number, since it uses less digits than its factorization.

91128022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747014.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 91128022 is about 9546.0998318685. The cubic root of 91128022 is about 450.0049744306.

The spelling of 91128022 in words is "ninety-one million, one hundred twenty-eight thousand, twenty-two".