30330720 has 384 divisors, whose sum is σ = 130636800. Its totient is φ = 6414336.

The previous prime is 30330709. The next prime is 30330733. The reversal of 30330720 is 2703303.

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

It is a junction number, because it is equal to n+sod(n) for n = 30330693 and 30330702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 514051 + ... + 514109.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^30330720 is an apocalyptic number.

30330720 is a gapful number since it is divisible by the number (30) 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 30330720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65318400).

30330720 is an abundant number, since it is smaller than the sum of its proper divisors (100306080).

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

30330720 is a wasteful number, since it uses less digits than its factorization.

30330720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 18.

The square root of 30330720 is about 5507.3332929831. Note that the first 3 decimals coincide. The cubic root of 30330720 is about 311.8608847257.

The spelling of 30330720 in words is "thirty million, three hundred thirty thousand, seven hundred twenty".