30503120 has 20 divisors (see below), whose sum is σ = 70919940. Its totient is φ = 12201216.

The previous prime is 30503119. The next prime is 30503149. The reversal of 30503120 is 2130503.

It can be written as a sum of positive squares in 2 ways, for example, as 7997584 + 22505536 = 2828^2 + 4744^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 30503095 and 30503104.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 190565 + ... + 190724.

It is an arithmetic number, because the mean of its divisors is an integer number (3545997).

Almost surely, 2^30503120 is an apocalyptic number.

It is an amenable number.

30503120 is an abundant number, since it is smaller than the sum of its proper divisors (40416820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30503120 is a wasteful number, since it uses less digits than its factorization.

30503120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381302 (or 381296 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 30503120 is about 5522.9629728978. The cubic root of 30503120 is about 312.4506418045.

Adding to 30503120 its reverse (2130503), we get a palindrome (32633623).

The spelling of 30503120 in words is "thirty million, five hundred three thousand, one hundred twenty".