642342880 has 48 divisors (see below), whose sum is σ = 1597412880. Its totient is φ = 243412992.

The previous prime is 642342839. The next prime is 642342887. The reversal of 642342880 is 88243246.

642342880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642342887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102609 + ... + 108688.

It is an arithmetic number, because the mean of its divisors is an integer number (33279435).

Almost surely, 2^642342880 is an apocalyptic number.

It is an amenable number.

642342880 is an abundant number, since it is smaller than the sum of its proper divisors (955070000).

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

642342880 is a wasteful number, since it uses less digits than its factorization.

642342880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211331 (or 211323 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 642342880 is about 25344.4842125461. The cubic root of 642342880 is about 862.8241749983.

The spelling of 642342880 in words is "six hundred forty-two million, three hundred forty-two thousand, eight hundred eighty".