91238 has 20 divisors (see below), whose sum is σ = 168060. Its totient is φ = 37044.

The previous prime is 91237. The next prime is 91243. The reversal of 91238 is 83219.

It is a super-3 number, since 3×91238³ = 2278497333879816, which contains 333 as substring.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91237) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4793 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (8403).

2⁹¹²³⁸ is an apocalyptic number.

91238 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

91238 is a deficient number, since it is larger than the sum of its proper divisors (76822).

91238 is an equidigital number, since it uses as much as digits as its factorization.

91238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49 (or 28 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 91238 is about 302.0562861455. The cubic root of 91238 is about 45.0185931397.

The spelling of 91238 in words is "ninety-one thousand, two hundred thirty-eight".