9778085 has 8 divisors (see below), whose sum is σ = 11855256. Its totient is φ = 7741440.

The previous prime is 9778081. The next prime is 9778091. The reversal of 9778085 is 5808779.

9778085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1304164 + 8473921 = 1142^2 + 2911^2 .

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

It is not a de Polignac number, because 9778085 - 2² = 9778081 is a prime.

It is a super-2 number, since 2×9778085² = 191221892534450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9778081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9596 + ... + 10565.

It is an arithmetic number, because the mean of its divisors is an integer number (1481907).

Almost surely, 2^9778085 is an apocalyptic number.

It is an amenable number.

9778085 is a deficient number, since it is larger than the sum of its proper divisors (2077171).

9778085 is a wasteful number, since it uses less digits than its factorization.

9778085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20263.

The product of its (nonzero) digits is 141120, while the sum is 44.

The square root of 9778085 is about 3126.9929644948. The cubic root of 9778085 is about 213.8378615804.

Adding to 9778085 its sum of digits (44), we get a square (9778129 = 3127²).

The spelling of 9778085 in words is "nine million, seven hundred seventy-eight thousand, eighty-five".