648427842 has 20 divisors (see below), whose sum is σ = 1452959046. Its totient is φ = 216142560.

The previous prime is 648427841. The next prime is 648427853. The reversal of 648427842 is 248724846.

It can be written as a sum of positive squares in only one way, i.e., 577008441 + 71419401 = 24021^2 + 8451^2 .

It is not an unprimeable number, because it can be changed into a prime (648427841) 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 in 9 ways as a sum of consecutive naturals, for example, 2001159 + ... + 2001482.

Almost surely, 2^648427842 is an apocalyptic number.

648427842 is an abundant number, since it is smaller than the sum of its proper divisors (804531204).

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

648427842 is a wasteful number, since it uses less digits than its factorization.

648427842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002655 (or 4002646 counting only the distinct ones).

The product of its digits is 688128, while the sum is 45.

The square root of 648427842 is about 25464.2463465935. The cubic root of 648427842 is about 865.5401493409.

The spelling of 648427842 in words is "six hundred forty-eight million, four hundred twenty-seven thousand, eight hundred forty-two".