30300720 has 80 divisors (see below), whose sum is σ = 94493952. Its totient is φ = 8032000.

The previous prime is 30300719. The next prime is 30300731. The reversal of 30300720 is 2700303.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30300720.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59989 + ... + 60491.

Almost surely, 2^30300720 is an apocalyptic number.

30300720 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 30300720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47246976).

30300720 is an abundant number, since it is smaller than the sum of its proper divisors (64193232).

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

30300720 is a wasteful number, since it uses less digits than its factorization.

30300720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 15.

The square root of 30300720 is about 5504.6089779384. The cubic root of 30300720 is about 311.7580306684.

The spelling of 30300720 in words is "thirty million, three hundred thousand, seven hundred twenty".