648819788 has 12 divisors (see below), whose sum is σ = 1184801520. Its totient is φ = 310305072.

The previous prime is 648819781. The next prime is 648819917. The reversal of 648819788 is 887918846.

It is not an unprimeable number, because it can be changed into a prime (648819781) 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 3 ways as a sum of consecutive naturals, for example, 3526103 + ... + 3526286.

It is an arithmetic number, because the mean of its divisors is an integer number (98733460).

Almost surely, 2^648819788 is an apocalyptic number.

It is an amenable number.

648819788 is a deficient number, since it is larger than the sum of its proper divisors (535981732).

648819788 is a wasteful number, since it uses less digits than its factorization.

648819788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7052416 (or 7052414 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 59.

The square root of 648819788 is about 25471.9411902587. The cubic root of 648819788 is about 865.7145078161.

The spelling of 648819788 in words is "six hundred forty-eight million, eight hundred nineteen thousand, seven hundred eighty-eight".