90650 has 36 divisors (see below), whose sum is σ = 201438. Its totient is φ = 30240.

The previous prime is 90647. The next prime is 90659. The reversal of 90650 is 5609.

It can be written as a sum of positive squares in 3 ways, for example, as 82369 + 8281 = 287^2 + 91^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2432 + ... + 2468.

2⁹⁰⁶⁵⁰ is an apocalyptic number.

90650 is an abundant number, since it is smaller than the sum of its proper divisors (110788).

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 (100719).

90650 is a wasteful number, since it uses less digits than its factorization.

90650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 90650 is about 301.0813843465. The cubic root of 90650 is about 44.9216744477.

The spelling of 90650 in words is "ninety thousand, six hundred fifty".