30065420 has 72 divisors (see below), whose sum is σ = 80151120. Its totient is φ = 9367680.

The previous prime is 30065419. The next prime is 30065437. The reversal of 30065420 is 2456003.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30065392 and 30065401.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9386 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (1113210).

Almost surely, 2^30065420 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 30065420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40075560).

30065420 is an abundant number, since it is smaller than the sum of its proper divisors (50085700).

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

30065420 is a wasteful number, since it uses less digits than its factorization.

30065420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823 (or 2814 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 30065420 is about 5483.1943244791. The cubic root of 30065420 is about 310.9489478963.

The spelling of 30065420 in words is "thirty million, sixty-five thousand, four hundred twenty".