It is a nude number because it is divisible by every one of its digits.
It is an unprimeable number.
Almost surely, 2642869136 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 642869136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213255680).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
642869136 is a wasteful number, since it uses less digits than its factorization.
642869136 is an odious number, because the sum of its binary digits is odd.
The square root of 642869136 is about 25354.8641487191. The cubic root of 642869136 is about 863.0597410113.
The spelling of 642869136 in words is "six hundred forty-two million, eight hundred sixty-nine thousand, one hundred thirty-six".