642803304 has 96 divisors (see below), whose sum is σ = 1902368160. Its totient is φ = 179794560.

The previous prime is 642803281. The next prime is 642803309. The reversal of 642803304 is 403308246.

It is not an unprimeable number, because it can be changed into a prime (642803309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29239 + ... + 46265.

It is an arithmetic number, because the mean of its divisors is an integer number (19816335).

Almost surely, 2^642803304 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 642803304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951184080).

642803304 is an abundant number, since it is smaller than the sum of its proper divisors (1259564856).

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

642803304 is a wasteful number, since it uses less digits than its factorization.

642803304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17071 (or 17056 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 642803304 is about 25353.5659030441. The cubic root of 642803304 is about 863.0302799151.

The spelling of 642803304 in words is "six hundred forty-two million, eight hundred three thousand, three hundred four".