648480642 has 16 divisors (see below), whose sum is σ = 1300442880. Its totient is φ = 215579952.

The previous prime is 648480617. The next prime is 648480643. The reversal of 648480642 is 246084846.

It is a junction number, because it is equal to n+sod(n) for n = 648480594 and 648480603.

It is not an unprimeable number, because it can be changed into a prime (648480643) 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 7 ways as a sum of consecutive naturals, for example, 142642 + ... + 147117.

It is an arithmetic number, because the mean of its divisors is an integer number (81277680).

Almost surely, 2^648480642 is an apocalyptic number.

648480642 is an abundant number, since it is smaller than the sum of its proper divisors (651962238).

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

648480642 is a wasteful number, since it uses less digits than its factorization.

648480642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290137.

The product of its (nonzero) digits is 294912, while the sum is 42.

The square root of 648480642 is about 25465.2830732352. The cubic root of 648480642 is about 865.5636416899.

The spelling of 648480642 in words is "six hundred forty-eight million, four hundred eighty thousand, six hundred forty-two".