30820242 has 32 divisors (see below), whose sum is σ = 66121920. Its totient is φ = 9547200.

The previous prime is 30820241. The next prime is 30820247. The reversal of 30820242 is 24202803.

It is not an unprimeable number, because it can be changed into a prime (30820241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3492 + ... + 8592.

It is an arithmetic number, because the mean of its divisors is an integer number (2066310).

Almost surely, 2^30820242 is an apocalyptic number.

30820242 is an abundant number, since it is smaller than the sum of its proper divisors (35301678).

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

30820242 is a wasteful number, since it uses less digits than its factorization.

30820242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 30820242 is about 5551.5981482813. The cubic root of 30820242 is about 313.5296960899.

The spelling of 30820242 in words is "thirty million, eight hundred twenty thousand, two hundred forty-two".