30504320 has 128 divisors (see below), whose sum is σ = 91065600. Its totient is φ = 9492480.

The previous prime is 30504319. The next prime is 30504337. The reversal of 30504320 is 2340503.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 48971 + ... + 49589.

It is an arithmetic number, because the mean of its divisors is an integer number (711450).

Almost surely, 2^30504320 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 30504320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45532800).

30504320 is an abundant number, since it is smaller than the sum of its proper divisors (60561280).

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

30504320 is a wasteful number, since it uses less digits than its factorization.

30504320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 30504320 is about 5523.0716091682. The cubic root of 30504320 is about 312.4547390449.

Adding to 30504320 its reverse (2340503), we get a palindrome (32844823).

The spelling of 30504320 in words is "thirty million, five hundred four thousand, three hundred twenty".