642342080 has 112 divisors (see below), whose sum is σ = 1581509664. Its totient is φ = 248340480.

The previous prime is 642342067. The next prime is 642342097. The reversal of 642342080 is 80243246.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2269619 + ... + 2269901.

It is an arithmetic number, because the mean of its divisors is an integer number (14120622).

Almost surely, 2^642342080 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 642342080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790754832).

642342080 is an abundant number, since it is smaller than the sum of its proper divisors (939167584).

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

642342080 is a wasteful number, since it uses less digits than its factorization.

642342080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 642342080 is about 25344.4684300145. The cubic root of 642342080 is about 862.8238167994.

The spelling of 642342080 in words is "six hundred forty-two million, three hundred forty-two thousand, eighty".