30120564 has 12 divisors (see below), whose sum is σ = 70281344. Its totient is φ = 10040184.

The previous prime is 30120557. The next prime is 30120569. The reversal of 30120564 is 46502103.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 30120564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120569) 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, 1255012 + ... + 1255035.

Almost surely, 2^30120564 is an apocalyptic number.

It is an amenable number.

30120564 is an abundant number, since it is smaller than the sum of its proper divisors (40160780).

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

30120564 is a wasteful number, since it uses less digits than its factorization.

30120564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510054 (or 2510052 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30120564 is about 5488.2204766208. The cubic root of 30120564 is about 311.1389391019.

Adding to 30120564 its reverse (46502103), we get a palindrome (76622667).

The spelling of 30120564 in words is "thirty million, one hundred twenty thousand, five hundred sixty-four".