30240556 has 12 divisors (see below), whose sum is σ = 52988992. Its totient is φ = 15100848.

The previous prime is 30240547. The next prime is 30240559. The reversal of 30240556 is 65504203.

It is a self number, because there is not a number n which added to its sum of digits gives 30240556.

It is not an unprimeable number, because it can be changed into a prime (30240559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020 + ... + 7843.

Almost surely, 2^30240556 is an apocalyptic number.

It is an amenable number.

30240556 is a deficient number, since it is larger than the sum of its proper divisors (22748436).

30240556 is a wasteful number, since it uses less digits than its factorization.

30240556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720 (or 9718 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 30240556 is about 5499.1413875259. The cubic root of 30240556 is about 311.5515555086.

Adding to 30240556 its reverse (65504203), we get a palindrome (95744759).

The spelling of 30240556 in words is "thirty million, two hundred forty thousand, five hundred fifty-six".