90656 has 12 divisors (see below), whose sum is σ = 178542. Its totient is φ = 45312.

The previous prime is 90647. The next prime is 90659. The reversal of 90656 is 65609.

It can be written as a sum of positive squares in only one way, i.e., 80656 + 10000 = 284^2 + 100^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 12.

It is a congruent number.

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

90656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1385 + ... + 1448.

2⁹⁰⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

90656 is a deficient number, since it is larger than the sum of its proper divisors (87886).

90656 is a wasteful number, since it uses less digits than its factorization.

90656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843 (or 2835 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 90656 is about 301.0913482649. The cubic root of 90656 is about 44.9226655274.

The spelling of 90656 in words is "ninety thousand, six hundred fifty-six".