30305642 has 8 divisors (see below), whose sum is σ = 46567332. Its totient is φ = 14783200.

The previous prime is 30305623. The next prime is 30305663. The reversal of 30305642 is 24650303.

It can be written as a sum of positive squares in 2 ways, for example, as 27133681 + 3171961 = 5209^2 + 1781^2 .

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

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, 184709 + ... + 184872.

Almost surely, 2^30305642 is an apocalyptic number.

30305642 is a deficient number, since it is larger than the sum of its proper divisors (16261690).

30305642 is a wasteful number, since it uses less digits than its factorization.

30305642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369624.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 30305642 is about 5505.0560396784. The cubic root of 30305642 is about 311.7749102447.

Adding to 30305642 its reverse (24650303), we get a palindrome (54955945).

The spelling of 30305642 in words is "thirty million, three hundred five thousand, six hundred forty-two".