648283540 has 12 divisors (see below), whose sum is σ = 1361395476. Its totient is φ = 259313408.

The previous prime is 648283529. The next prime is 648283541. The reversal of 648283540 is 45382846.

It can be written as a sum of positive squares in 2 ways, for example, as 183277444 + 465006096 = 13538^2 + 21564^2 .

It is a junction number, because it is equal to n+sod(n) for n = 648283493 and 648283502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648283541) 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 3 ways as a sum of consecutive naturals, for example, 16207069 + ... + 16207108.

It is an arithmetic number, because the mean of its divisors is an integer number (113449623).

Almost surely, 2^648283540 is an apocalyptic number.

It is an amenable number.

648283540 is an abundant number, since it is smaller than the sum of its proper divisors (713111936).

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

648283540 is a wasteful number, since it uses less digits than its factorization.

648283540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32414186 (or 32414184 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 648283540 is about 25461.4127652022. The cubic root of 648283540 is about 865.4759384230.

The spelling of 648283540 in words is "six hundred forty-eight million, two hundred eighty-three thousand, five hundred forty".