648408834 has 32 divisors (see below), whose sum is σ = 1487393280. Its totient is φ = 209163600.

The previous prime is 648408829. The next prime is 648408841. The reversal of 648408834 is 438804846.

648408834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 648408834.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191997 + ... + 195344.

It is an arithmetic number, because the mean of its divisors is an integer number (46481040).

Almost surely, 2^648408834 is an apocalyptic number.

648408834 is an abundant number, since it is smaller than the sum of its proper divisors (838984446).

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

648408834 is a wasteful number, since it uses less digits than its factorization.

648408834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387383 (or 387377 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The square root of 648408834 is about 25463.8731146697. The cubic root of 648408834 is about 865.5316917831.

The spelling of 648408834 in words is "six hundred forty-eight million, four hundred eight thousand, eight hundred thirty-four".