30804805 has 4 divisors (see below), whose sum is σ = 36965772. Its totient is φ = 24643840.

The previous prime is 30804803. The next prime is 30804821. The reversal of 30804805 is 50840803.

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 15610401 + 15194404 = 3951^2 + 3898^2 .

It is not a de Polignac number, because 30804805 - 2¹ = 30804803 is a prime.

It is a super-3 number, since 3×30804805³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30804803) 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, 3080476 + ... + 3080485.

It is an arithmetic number, because the mean of its divisors is an integer number (9241443).

Almost surely, 2^30804805 is an apocalyptic number.

It is an amenable number.

30804805 is a deficient number, since it is larger than the sum of its proper divisors (6160967).

30804805 is an equidigital number, since it uses as much as digits as its factorization.

30804805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160966.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 30804805 is about 5550.2076537730. The cubic root of 30804805 is about 313.4773412532.

The spelling of 30804805 in words is "thirty million, eight hundred four thousand, eight hundred five".