30309320 has 32 divisors (see below), whose sum is σ = 70398720. Its totient is φ = 11732160.

The previous prime is 30309311. The next prime is 30309341. The reversal of 30309320 is 2390303.

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 = 30309292 and 30309301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10982 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (2199960).

Almost surely, 2^30309320 is an apocalyptic number.

It is an amenable number.

30309320 is an abundant number, since it is smaller than the sum of its proper divisors (40089400).

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

30309320 is a wasteful number, since it uses less digits than its factorization.

30309320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24485 (or 24481 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 30309320 is about 5505.3900860884. The cubic root of 30309320 is about 311.7875224368.

Adding to 30309320 its reverse (2390303), we get a palindrome (32699623).

The spelling of 30309320 in words is "thirty million, three hundred nine thousand, three hundred twenty".