642840710 has 16 divisors (see below), whose sum is σ = 1178946576. Its totient is φ = 252284448.

The previous prime is 642840697. The next prime is 642840787. The reversal of 642840710 is 17048246.

It is a congruent number.

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, 605924 + ... + 606983.

It is an arithmetic number, because the mean of its divisors is an integer number (73684161).

Almost surely, 2^642840710 is an apocalyptic number.

642840710 is a deficient number, since it is larger than the sum of its proper divisors (536105866).

642840710 is a wasteful number, since it uses less digits than its factorization.

642840710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212967.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 642840710 is about 25354.3035794715. The cubic root of 642840710 is about 863.0470200720.

Adding to 642840710 its reverse (17048246), we get a palindrome (659888956).

The spelling of 642840710 in words is "six hundred forty-two million, eight hundred forty thousand, seven hundred ten".