648020442 has 16 divisors (see below), whose sum is σ = 1331069472. Its totient is φ = 210168720.

The previous prime is 648020413. The next prime is 648020447. The reversal of 648020442 is 244020846.

It is not an unprimeable number, because it can be changed into a prime (648020447) by changing a digit.

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, 1459284 + ... + 1459727.

It is an arithmetic number, because the mean of its divisors is an integer number (83191842).

Almost surely, 2^648020442 is an apocalyptic number.

648020442 is an abundant number, since it is smaller than the sum of its proper divisors (683049030).

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

648020442 is a wasteful number, since it uses less digits than its factorization.

648020442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919053.

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 648020442 is about 25456.2456383497. The cubic root of 648020442 is about 865.3588416152.

The spelling of 648020442 in words is "six hundred forty-eight million, twenty thousand, four hundred forty-two".