30820305 has 8 divisors (see below), whose sum is σ = 49312512. Its totient is φ = 16437488.

The previous prime is 30820277. The next prime is 30820313. The reversal of 30820305 is 50302803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30820305 - 2⁶ = 30820241 is a prime.

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, 1027329 + ... + 1027358.

It is an arithmetic number, because the mean of its divisors is an integer number (6164064).

Almost surely, 2^30820305 is an apocalyptic number.

It is an amenable number.

30820305 is a deficient number, since it is larger than the sum of its proper divisors (18492207).

30820305 is a wasteful number, since it uses less digits than its factorization.

30820305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054695.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30820305 is about 5551.6038223202. The cubic root of 30820305 is about 313.5299097196.

It can be divided in two parts, 30820 and 305, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 30820305 in words is "thirty million, eight hundred twenty thousand, three hundred five".