648208468 has 12 divisors (see below), whose sum is σ = 1134543060. Its totient is φ = 324053312.

The previous prime is 648208409. The next prime is 648208469. The reversal of 648208468 is 864802846.

It can be written as a sum of positive squares in 2 ways, for example, as 556393744 + 91814724 = 23588^2 + 9582^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648208469) 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, 43830 + ... + 56722.

It is an arithmetic number, because the mean of its divisors is an integer number (94545255).

Almost surely, 2^648208468 is an apocalyptic number.

It is an amenable number.

648208468 is a deficient number, since it is larger than the sum of its proper divisors (486334592).

648208468 is a wasteful number, since it uses less digits than its factorization.

648208468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25466 (or 25464 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 46.

The square root of 648208468 is about 25459.9384916775. The cubic root of 648208468 is about 865.4425294212.

The spelling of 648208468 in words is "six hundred forty-eight million, two hundred eight thousand, four hundred sixty-eight".