91650258 has 64 divisors (see below), whose sum is σ = 239089920. Its totient is φ = 25474176.

The previous prime is 91650257. The next prime is 91650271. The reversal of 91650258 is 85205619.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91650257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10710 + ... + 17262.

It is an arithmetic number, because the mean of its divisors is an integer number (3735780).

Almost surely, 2^91650258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91650258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119544960).

91650258 is an abundant number, since it is smaller than the sum of its proper divisors (147439662).

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

91650258 is a wasteful number, since it uses less digits than its factorization.

91650258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608 (or 6602 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 91650258 is about 9573.4141245430. The cubic root of 91650258 is about 450.8629662516.

The spelling of 91650258 in words is "ninety-one million, six hundred fifty thousand, two hundred fifty-eight".