30112409 has 6 divisors (see below), whose sum is σ = 30882894. Its totient is φ = 29343680.

The previous prime is 30112403. The next prime is 30112421. The reversal of 30112409 is 90421103.

It can be written as a sum of positive squares in 3 ways, for example, as 10220809 + 19891600 = 3197^2 + 4460^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30112409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30112403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34709 + ... + 35565.

It is an arithmetic number, because the mean of its divisors is an integer number (5147149).

Almost surely, 2^30112409 is an apocalyptic number.

It is an amenable number.

30112409 is a deficient number, since it is larger than the sum of its proper divisors (770485).

30112409 is an frugal number, since it uses more digits than its factorization.

30112409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 30112409 is about 5487.4774714800. The cubic root of 30112409 is about 311.1108567694.

The spelling of 30112409 in words is "thirty million, one hundred twelve thousand, four hundred nine".