30090685 has 4 divisors (see below), whose sum is σ = 36108828. Its totient is φ = 24072544.

The previous prime is 30090667. The next prime is 30090689. The reversal of 30090685 is 58609003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14002564 + 16088121 = 3742^2 + 4011^2 .

It is a cyclic number.

It is not a de Polignac number, because 30090685 - 2⁵ = 30090653 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30090689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3009064 + ... + 3009073.

It is an arithmetic number, because the mean of its divisors is an integer number (9027207).

Almost surely, 2^30090685 is an apocalyptic number.

It is an amenable number.

30090685 is a deficient number, since it is larger than the sum of its proper divisors (6018143).

30090685 is an equidigital number, since it uses as much as digits as its factorization.

30090685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6018142.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 30090685 is about 5485.4976984773. The cubic root of 30090685 is about 311.0360238527.

Adding to 30090685 its reverse (58609003), we get a palindrome (88699688).

The spelling of 30090685 in words is "thirty million, ninety thousand, six hundred eighty-five".