91296090 has 96 divisors (see below), whose sum is σ = 245846016. Its totient is φ = 23493120.

The previous prime is 91296067. The next prime is 91296091. The reversal of 91296090 is 9069219.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91296091) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 477895 + ... + 478085.

It is an arithmetic number, because the mean of its divisors is an integer number (2560896).

Almost surely, 2^91296090 is an apocalyptic number.

91296090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 91296090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122923008).

91296090 is an abundant number, since it is smaller than the sum of its proper divisors (154549926).

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

91296090 is a wasteful number, since it uses less digits than its factorization.

91296090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 91296090 is about 9554.8987435765. The cubic root of 91296090 is about 450.2814535571.

The spelling of 91296090 in words is "ninety-one million, two hundred ninety-six thousand, ninety".