91284 has 12 divisors (see below), whose sum is σ = 213024. Its totient is φ = 30424.

The previous prime is 91283. The next prime is 91291. The reversal of 91284 is 48219.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3792 + ... + 3815.

It is an arithmetic number, because the mean of its divisors is an integer number (17752).

2⁹¹²⁸⁴ is an apocalyptic number.

It is an amenable number.

91284 is an abundant number, since it is smaller than the sum of its proper divisors (121740).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106512).

91284 is a wasteful number, since it uses less digits than its factorization.

91284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7614 (or 7612 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 91284 is about 302.1324212990. The cubic root of 91284 is about 45.0261576316.

The spelling of 91284 in words is "ninety-one thousand, two hundred eighty-four".