642746082 has 32 divisors (see below), whose sum is σ = 1450716480. Its totient is φ = 188054720.

The previous prime is 642746021. The next prime is 642746089. The reversal of 642746082 is 280647246.

642746082 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 642746082.

It is not an unprimeable number, because it can be changed into a prime (642746089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165993 + ... + 169820.

It is an arithmetic number, because the mean of its divisors is an integer number (45334890).

Almost surely, 2^642746082 is an apocalyptic number.

642746082 is an abundant number, since it is smaller than the sum of its proper divisors (807970398).

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

642746082 is a wasteful number, since it uses less digits than its factorization.

642746082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335858.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 642746082 is about 25352.4373976152. The cubic root of 642746082 is about 863.0046703267.

The spelling of 642746082 in words is "six hundred forty-two million, seven hundred forty-six thousand, eighty-two".