642686282 has 8 divisors (see below), whose sum is σ = 1101747936. Its totient is φ = 275436972.

The previous prime is 642686281. The next prime is 642686287. The reversal of 642686282 is 282686246.

642686282 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×642686282³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (642686281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22953068 + ... + 22953095.

It is an arithmetic number, because the mean of its divisors is an integer number (137718492).

Almost surely, 2^642686282 is an apocalyptic number.

642686282 is a deficient number, since it is larger than the sum of its proper divisors (459061654).

642686282 is a wasteful number, since it uses less digits than its factorization.

642686282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45906172.

The product of its digits is 442368, while the sum is 44.

The square root of 642686282 is about 25351.2579963993. The cubic root of 642686282 is about 862.9779053354.

The spelling of 642686282 in words is "six hundred forty-two million, six hundred eighty-six thousand, two hundred eighty-two".