91798028 has 24 divisors (see below), whose sum is σ = 194396832. Its totient is φ = 37027584.

The previous prime is 91798027. The next prime is 91798033. The reversal of 91798028 is 82089719.

It is a self number, because there is not a number n which added to its sum of digits gives 91798028.

It is not an unprimeable number, because it can be changed into a prime (91798027) 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 7 ways as a sum of consecutive naturals, for example, 95951 + ... + 96902.

It is an arithmetic number, because the mean of its divisors is an integer number (8099868).

Almost surely, 2^91798028 is an apocalyptic number.

It is an amenable number.

91798028 is an abundant number, since it is smaller than the sum of its proper divisors (102598804).

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

91798028 is a wasteful number, since it uses less digits than its factorization.

91798028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192881 (or 192879 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 91798028 is about 9581.1287435250. The cubic root of 91798028 is about 451.1051486796.

The spelling of 91798028 in words is "ninety-one million, seven hundred ninety-eight thousand, twenty-eight".