30120256 has 28 divisors (see below), whose sum is σ = 60017152. Its totient is φ = 14997888.

The previous prime is 30120239. The next prime is 30120289. The reversal of 30120256 is 65202103.

It is a happy number.

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, 17281 + ... + 18943.

Almost surely, 2^30120256 is an apocalyptic number.

It is an amenable number.

30120256 is a deficient number, since it is larger than the sum of its proper divisors (29896896).

30120256 is a wasteful number, since it uses less digits than its factorization.

30120256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 30120256 is about 5488.1924164519. The cubic root of 30120256 is about 311.1378785737.

Adding to 30120256 its reverse (65202103), we get a palindrome (95322359).

The spelling of 30120256 in words is "thirty million, one hundred twenty thousand, two hundred fifty-six".