30120912 has 30 divisors (see below), whose sum is σ = 84297122. Its totient is φ = 10040256.

The previous prime is 30120887. The next prime is 30120917. The reversal of 30120912 is 21902103.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 46656 = 5484^2 + 216^2 .

It is a super-3 number, since 3×30120912³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104443 + ... + 104730.

Almost surely, 2^30120912 is an apocalyptic number.

It is an amenable number.

30120912 is an abundant number, since it is smaller than the sum of its proper divisors (54176210).

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

30120912 is a wasteful number, since it uses less digits than its factorization.

30120912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209187 (or 209178 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 30120912 is about 5488.2521807949. The cubic root of 30120912 is about 311.1401373523.

The spelling of 30120912 in words is "thirty million, one hundred twenty thousand, nine hundred twelve".