30420493 has 8 divisors (see below), whose sum is σ = 30917016. Its totient is φ = 29928000.

The previous prime is 30420491. The next prime is 30420521. The reversal of 30420493 is 39402403.

It can be written as a sum of positive squares in 4 ways, for example, as 8311689 + 22108804 = 2883^2 + 4702^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 30420493 - 2¹ = 30420491 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 (30420491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16603 + ... + 18343.

It is an arithmetic number, because the mean of its divisors is an integer number (3864627).

Almost surely, 2^30420493 is an apocalyptic number.

It is an amenable number.

30420493 is a deficient number, since it is larger than the sum of its proper divisors (496523).

30420493 is a wasteful number, since it uses less digits than its factorization.

30420493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 30420493 is about 5515.4775858488. The cubic root of 30420493 is about 312.1682640754.

Adding to 30420493 its reverse (39402403), we get a palindrome (69822896).

The spelling of 30420493 in words is "thirty million, four hundred twenty thousand, four hundred ninety-three".