30828285 has 12 divisors (see below), whose sum is σ = 53435772. Its totient is φ = 16441728.

The previous prime is 30828283. The next prime is 30828299. The reversal of 30828285 is 58282803.

It can be written as a sum of positive squares in 2 ways, for example, as 21846276 + 8982009 = 4674^2 + 2997^2 .

It is not a de Polignac number, because 30828285 - 2¹ = 30828283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30828283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342492 + ... + 342581.

It is an arithmetic number, because the mean of its divisors is an integer number (4452981).

Almost surely, 2^30828285 is an apocalyptic number.

It is an amenable number.

30828285 is a deficient number, since it is larger than the sum of its proper divisors (22607487).

30828285 is a wasteful number, since it uses less digits than its factorization.

30828285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685084 (or 685081 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 30828285 is about 5552.3224870319. The cubic root of 30828285 is about 313.5569671284.

It can be divided in two parts, 30828 and 285, that added together give a palindrome (31113).

The spelling of 30828285 in words is "thirty million, eight hundred twenty-eight thousand, two hundred eighty-five".