642848708 has 6 divisors (see below), whose sum is σ = 1124985246. Its totient is φ = 321424352.

The previous prime is 642848707. The next prime is 642848711. The reversal of 642848708 is 807848246.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 586027264 + 56821444 = 24208^2 + 7538^2 .

It is a super-2 number, since 2×642848708² = 826508922754538528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642848707) by changing a digit.

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 as a sum of consecutive naturals, namely, 80356085 + ... + 80356092.

It is an arithmetic number, because the mean of its divisors is an integer number (187497541).

Almost surely, 2^642848708 is an apocalyptic number.

It is an amenable number.

642848708 is a deficient number, since it is larger than the sum of its proper divisors (482136538).

642848708 is a wasteful number, since it uses less digits than its factorization.

642848708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160712181 (or 160712179 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 47.

The square root of 642848708 is about 25354.4613036838. The cubic root of 642848708 is about 863.0505993005.

The spelling of 642848708 in words is "six hundred forty-two million, eight hundred forty-eight thousand, seven hundred eight".