30120680 has 32 divisors (see below), whose sum is σ = 68925600. Its totient is φ = 11843136.

The previous prime is 30120679. The next prime is 30120689. The reversal of 30120680 is 8602103.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (30120689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4022 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (2153925).

Almost surely, 2^30120680 is an apocalyptic number.

It is an amenable number.

30120680 is an abundant number, since it is smaller than the sum of its proper divisors (38804920).

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

30120680 is a wasteful number, since it uses less digits than its factorization.

30120680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12833 (or 12829 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 30120680 is about 5488.2310446992. The cubic root of 30120680 is about 311.1393385197.

Adding to 30120680 its reverse (8602103), we get a palindrome (38722783).

The spelling of 30120680 in words is "thirty million, one hundred twenty thousand, six hundred eighty".