30120804 has 144 divisors (see below), whose sum is σ = 94348800. Its totient is φ = 7907328.

The previous prime is 30120803. The next prime is 30120817. The reversal of 30120804 is 40802103.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (30120803) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 338392 + ... + 338480.

It is an arithmetic number, because the mean of its divisors is an integer number (655200).

Almost surely, 2^30120804 is an apocalyptic number.

30120804 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30120804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47174400).

30120804 is an abundant number, since it is smaller than the sum of its proper divisors (64227996).

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

30120804 is a wasteful number, since it uses less digits than its factorization.

30120804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 30120804 is about 5488.2423415881. The cubic root of 30120804 is about 311.1397654824.

Adding to 30120804 its reverse (40802103), we get a palindrome (70922907).

The spelling of 30120804 in words is "thirty million, one hundred twenty thousand, eight hundred four".