30206393 has 12 divisors (see below), whose sum is σ = 36089892. Its totient is φ = 25189920.

The previous prime is 30206389. The next prime is 30206411. The reversal of 30206393 is 39360203.

It can be written as a sum of positive squares in 2 ways, for example, as 21603904 + 8602489 = 4648^2 + 2933^2 .

It is not a de Polignac number, because 30206393 - 2² = 30206389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30206593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6518 + ... + 10143.

It is an arithmetic number, because the mean of its divisors is an integer number (3007491).

Almost surely, 2^30206393 is an apocalyptic number.

It is an amenable number.

30206393 is a deficient number, since it is larger than the sum of its proper divisors (5883499).

30206393 is a wasteful number, since it uses less digits than its factorization.

30206393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16712 (or 16705 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 30206393 is about 5496.0342975640. The cubic root of 30206393 is about 311.4341905331.

Adding to 30206393 its reverse (39360203), we get a palindrome (69566596).

The spelling of 30206393 in words is "thirty million, two hundred six thousand, three hundred ninety-three".