30345520 has 20 divisors (see below), whose sum is σ = 70553520. Its totient is φ = 12138176.

The previous prime is 30345517. The next prime is 30345541. The reversal of 30345520 is 2554303.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 30345491 and 30345500.

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 3 ways as a sum of consecutive naturals, for example, 189580 + ... + 189739.

It is an arithmetic number, because the mean of its divisors is an integer number (3527676).

Almost surely, 2^30345520 is an apocalyptic number.

It is an amenable number.

30345520 is an abundant number, since it is smaller than the sum of its proper divisors (40208000).

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

30345520 is a wasteful number, since it uses less digits than its factorization.

30345520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379332 (or 379326 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 30345520 is about 5508.6767921162. The cubic root of 30345520 is about 311.9116010795.

Adding to 30345520 its reverse (2554303), we get a palindrome (32899823).

The spelling of 30345520 in words is "thirty million, three hundred forty-five thousand, five hundred twenty".