642707744 has 48 divisors (see below), whose sum is σ = 1495972800. Its totient is φ = 265945344.

The previous prime is 642707719. The next prime is 642707777. The reversal of 642707744 is 447707246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42974 + ... + 55965.

It is an arithmetic number, because the mean of its divisors is an integer number (31166100).

Almost surely, 2^642707744 is an apocalyptic number.

It is an amenable number.

642707744 is an abundant number, since it is smaller than the sum of its proper divisors (853265056).

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

642707744 is a wasteful number, since it uses less digits than its factorization.

642707744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98985 (or 98977 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 41.

The square root of 642707744 is about 25351.6812854690. The cubic root of 642707744 is about 862.9875113833.

The spelling of 642707744 in words is "six hundred forty-two million, seven hundred seven thousand, seven hundred forty-four".