9905285 has 8 divisors (see below), whose sum is σ = 12800760. Its totient is φ = 7314624.

The previous prime is 9905267. The next prime is 9905293. The reversal of 9905285 is 5825099.

It is a happy number.

9905285 is digitally balanced in base 3, 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 2076481 + 7828804 = 1441^2 + 2798^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 9905285 - 2⁶ = 9905221 is a prime.

It is a super-2 number, since 2×9905285² = 196229341862450, which contains 22 as substring.

It is a congruent 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, 76130 + ... + 76259.

It is an arithmetic number, because the mean of its divisors is an integer number (1600095).

Almost surely, 2^9905285 is an apocalyptic number.

It is an amenable number.

9905285 is a deficient number, since it is larger than the sum of its proper divisors (2895475).

9905285 is a wasteful number, since it uses less digits than its factorization.

9905285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152407.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 9905285 is about 3147.2662740861. The cubic root of 9905285 is about 214.7611192164.

The spelling of 9905285 in words is "nine million, nine hundred five thousand, two hundred eighty-five".