30397805 has 8 divisors (see below), whose sum is σ = 36570744. Its totient is φ = 24256000.

The previous prime is 30397747. The next prime is 30397813. The reversal of 30397805 is 50879303.

It can be written as a sum of positive squares in 4 ways, for example, as 12369289 + 18028516 = 3517^2 + 4246^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30397805 - 2¹² = 30393709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5576 + ... + 9585.

It is an arithmetic number, because the mean of its divisors is an integer number (4571343).

Almost surely, 2^30397805 is an apocalyptic number.

It is an amenable number.

30397805 is a deficient number, since it is larger than the sum of its proper divisors (6172939).

30397805 is a wasteful number, since it uses less digits than its factorization.

30397805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15567.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 30397805 is about 5513.4204446967. The cubic root of 30397805 is about 312.0906383880.

The spelling of 30397805 in words is "thirty million, three hundred ninety-seven thousand, eight hundred five".