90785 has 8 divisors (see below), whose sum is σ = 110976. Its totient is φ = 71280.

The previous prime is 90749. The next prime is 90787. The reversal of 90785 is 58709.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90785 - 2⁸ = 90529 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90787) 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 7 ways as a sum of consecutive naturals, for example, 200 + ... + 470.

It is an arithmetic number, because the mean of its divisors is an integer number (13872).

2⁹⁰⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

90785 is a deficient number, since it is larger than the sum of its proper divisors (20191).

90785 is a wasteful number, since it uses less digits than its factorization.

90785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 90785 is about 301.3054928142. The cubic root of 90785 is about 44.9439631702.

The spelling of 90785 in words is "ninety thousand, seven hundred eighty-five".