643039488 has 216 divisors, whose sum is σ = 2282641088. Its totient is φ = 169537536.

The previous prime is 643039487. The next prime is 643039499. The reversal of 643039488 is 884930346.

It is not an unprimeable number, because it can be changed into a prime (643039487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 208131 + ... + 211197.

Almost surely, 2^643039488 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 643039488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1141320544).

643039488 is an abundant number, since it is smaller than the sum of its proper divisors (1639601600).

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

643039488 is a wasteful number, since it uses less digits than its factorization.

643039488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109 (or 3092 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 643039488 is about 25358.2232816102. The cubic root of 643039488 is about 863.1359674987.

The spelling of 643039488 in words is "six hundred forty-three million, thirty-nine thousand, four hundred eighty-eight".