642853448 has 32 divisors (see below), whose sum is σ = 1309728000. Its totient is φ = 294684480.

The previous prime is 642853433. The next prime is 642853481. The reversal of 642853448 is 844358246.

It is a junction number, because it is equal to n+sod(n) for n = 642853399 and 642853408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63503 + ... + 72926.

It is an arithmetic number, because the mean of its divisors is an integer number (40929000).

Almost surely, 2^642853448 is an apocalyptic number.

It is an amenable number.

642853448 is an abundant number, since it is smaller than the sum of its proper divisors (666874552).

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

642853448 is a wasteful number, since it uses less digits than its factorization.

642853448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136485 (or 136481 counting only the distinct ones).

The product of its digits is 737280, while the sum is 44.

The square root of 642853448 is about 25354.5547781853. The cubic root of 642853448 is about 863.0527205097.

The spelling of 642853448 in words is "six hundred forty-two million, eight hundred fifty-three thousand, four hundred forty-eight".