642885080 has 32 divisors (see below), whose sum is σ = 1448785440. Its totient is φ = 256746240.

The previous prime is 642885077. The next prime is 642885091. The reversal of 642885080 is 80588246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13460 + ... + 38300.

It is an arithmetic number, because the mean of its divisors is an integer number (45274545).

Almost surely, 2^642885080 is an apocalyptic number.

It is an amenable number.

642885080 is an abundant number, since it is smaller than the sum of its proper divisors (805900360).

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

642885080 is a wasteful number, since it uses less digits than its factorization.

642885080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25499 (or 25495 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 642885080 is about 25355.1785637570. The cubic root of 642885080 is about 863.0668759578.

The spelling of 642885080 in words is "six hundred forty-two million, eight hundred eighty-five thousand, eighty".