91086258 has 16 divisors (see below), whose sum is σ = 182540736. Its totient is φ = 30300720.

The previous prime is 91086257. The next prime is 91086269. The reversal of 91086258 is 85268019.

It is not an unprimeable number, because it can be changed into a prime (91086253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12073 + ... + 18108.

It is an arithmetic number, because the mean of its divisors is an integer number (11408796).

Almost surely, 2^91086258 is an apocalyptic number.

91086258 is an abundant number, since it is smaller than the sum of its proper divisors (91454478).

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

91086258 is a wasteful number, since it uses less digits than its factorization.

91086258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30689.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 91086258 is about 9543.9120909614. The cubic root of 91086258 is about 449.9362181206.

The spelling of 91086258 in words is "ninety-one million, eighty-six thousand, two hundred fifty-eight".