91038 has 8 divisors (see below), whose sum is σ = 182088. Its totient is φ = 30344.

The previous prime is 91033. The next prime is 91079. The reversal of 91038 is 83019.

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

91038 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91033) by changing a digit.

91038 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7581 + ... + 7592.

It is an arithmetic number, because the mean of its divisors is an integer number (22761).

2⁹¹⁰³⁸ is an apocalyptic number.

91038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (91044).

91038 is a wasteful number, since it uses less digits than its factorization.

91038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15178.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 91038 is about 301.7250403927. The cubic root of 91038 is about 44.9856744524.

The spelling of 91038 in words is "ninety-one thousand, thirty-eight".