91435856 has 40 divisors (see below), whose sum is σ = 185613120. Its totient is φ = 43552256.

The previous prime is 91435853. The next prime is 91435891. The reversal of 91435856 is 65853419.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91435853) 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, 153896 + ... + 154488.

It is an arithmetic number, because the mean of its divisors is an integer number (4640328).

Almost surely, 2^91435856 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 91435856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92806560).

91435856 is an abundant number, since it is smaller than the sum of its proper divisors (94177264).

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

91435856 is a wasteful number, since it uses less digits than its factorization.

91435856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1037 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 91435856 is about 9562.2097864458. The cubic root of 91435856 is about 450.5111163663.

The spelling of 91435856 in words is "ninety-one million, four hundred thirty-five thousand, eight hundred fifty-six".