91038285 has 24 divisors (see below), whose sum is σ = 169939224. Its totient is φ = 44818560.

The previous prime is 91038251. The next prime is 91038287. The reversal of 91038285 is 58283019.

It can be written as a sum of positive squares in 4 ways, for example, as 7918596 + 83119689 = 2814^2 + 9117^2 .

It is not a de Polignac number, because 91038285 - 2²⁰ = 89989709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91038287) 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 23 ways as a sum of consecutive naturals, for example, 77226 + ... + 78395.

It is an arithmetic number, because the mean of its divisors is an integer number (7080801).

Almost surely, 2^91038285 is an apocalyptic number.

It is an amenable number.

91038285 is a deficient number, since it is larger than the sum of its proper divisors (78900939).

91038285 is a wasteful number, since it uses less digits than its factorization.

91038285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155645 (or 155642 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 91038285 is about 9541.3984824029. The cubic root of 91038285 is about 449.8572139577.

The spelling of 91038285 in words is "ninety-one million, thirty-eight thousand, two hundred eighty-five".