642030306 has 8 divisors (see below), whose sum is σ = 1284060624. Its totient is φ = 214010100.

The previous prime is 642030239. The next prime is 642030329. The reversal of 642030306 is 603030246.

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

642030306 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 53502520 + ... + 53502531.

It is an arithmetic number, because the mean of its divisors is an integer number (160507578).

Almost surely, 2^642030306 is an apocalyptic number.

642030306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

642030306 is a wasteful number, since it uses less digits than its factorization.

642030306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107005056.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 642030306 is about 25338.3169527891. The cubic root of 642030306 is about 862.6841977525.

The spelling of 642030306 in words is "six hundred forty-two million, thirty thousand, three hundred six".