648485380 has 12 divisors (see below), whose sum is σ = 1361819340. Its totient is φ = 259394144.

The previous prime is 648485351. The next prime is 648485381. The reversal of 648485380 is 83584846.

It can be written as a sum of positive squares in 2 ways, for example, as 459587844 + 188897536 = 21438^2 + 13744^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 648485380.

It is not an unprimeable number, because it can be changed into a prime (648485381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16212115 + ... + 16212154.

It is an arithmetic number, because the mean of its divisors is an integer number (113484945).

Almost surely, 2^648485380 is an apocalyptic number.

It is an amenable number.

648485380 is an abundant number, since it is smaller than the sum of its proper divisors (713333960).

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

648485380 is a wasteful number, since it uses less digits than its factorization.

648485380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32424278 (or 32424276 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 46.

The square root of 648485380 is about 25465.3761016797. The cubic root of 648485380 is about 865.5657497099.

The spelling of 648485380 in words is "six hundred forty-eight million, four hundred eighty-five thousand, three hundred eighty".