648268388 has 12 divisors (see below), whose sum is σ = 1135178352. Its totient is φ = 323931720.

The previous prime is 648268367. The next prime is 648268417. The reversal of 648268388 is 883862846.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43298 + ... + 56313.

It is an arithmetic number, because the mean of its divisors is an integer number (94598196).

Almost surely, 2^648268388 is an apocalyptic number.

It is an amenable number.

648268388 is a deficient number, since it is larger than the sum of its proper divisors (486909964).

648268388 is a wasteful number, since it uses less digits than its factorization.

648268388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101242 (or 101240 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 53.

The square root of 648268388 is about 25461.1152151668. The cubic root of 648268388 is about 865.4691955948.

The spelling of 648268388 in words is "six hundred forty-eight million, two hundred sixty-eight thousand, three hundred eighty-eight".