30385220 has 12 divisors (see below), whose sum is σ = 63809004. Its totient is φ = 12154080.

The previous prime is 30385213. The next prime is 30385247. The reversal of 30385220 is 2258303.

It can be written as a sum of positive squares in 2 ways, for example, as 12559936 + 17825284 = 3544^2 + 4222^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759611 + ... + 759650.

It is an arithmetic number, because the mean of its divisors is an integer number (5317417).

Almost surely, 2^30385220 is an apocalyptic number.

It is an amenable number.

30385220 is an abundant number, since it is smaller than the sum of its proper divisors (33423784).

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

30385220 is a wasteful number, since it uses less digits than its factorization.

30385220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519270 (or 1519268 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 30385220 is about 5512.2790205141. The cubic root of 30385220 is about 312.0475628782.

The spelling of 30385220 in words is "thirty million, three hundred eighty-five thousand, two hundred twenty".