90782785 has 8 divisors (see below), whose sum is σ = 110063016. Its totient is φ = 71877120.

The previous prime is 90782773. The next prime is 90782807. The reversal of 90782785 is 58728709.

It is a Cunningham number, because it is equal to 9528²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 90782784 = 1^2 + 9528^2 .

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

It is not a de Polignac number, because 90782785 - 2⁵ = 90782753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93106 + ... + 94075.

It is an arithmetic number, because the mean of its divisors is an integer number (13757877).

Almost surely, 2^90782785 is an apocalyptic number.

It is an amenable number.

90782785 is a deficient number, since it is larger than the sum of its proper divisors (19280231).

90782785 is a wasteful number, since it uses less digits than its factorization.

90782785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187283.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 90782785 is about 9528.0000524769. Note that the first 4 decimals coincide. The cubic root of 90782785 is about 449.4359764840.

The spelling of 90782785 in words is "ninety million, seven hundred eighty-two thousand, seven hundred eighty-five".