30820000 has 120 divisors (see below), whose sum is σ = 80299296. Its totient is φ = 11616000.

The previous prime is 30819991. The next prime is 30820003. The reversal of 30820000 is 2803.

It is not an unprimeable number, because it can be changed into a prime (30820003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 459967 + ... + 460033.

Almost surely, 2^30820000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30820000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40149648).

30820000 is an abundant number, since it is smaller than the sum of its proper divisors (49479296).

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

30820000 is an equidigital number, since it uses as much as digits as its factorization.

30820000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 30820000 is about 5551.5763527128. The cubic root of 30820000 is about 313.5288754778.

Adding to 30820000 its reverse (2803), we get a palindrome (30822803).

The spelling of 30820000 in words is "thirty million, eight hundred twenty thousand".