648851398 has 8 divisors (see below), whose sum is σ = 1048144608. Its totient is φ = 299469864.

The previous prime is 648851369. The next prime is 648851417. The reversal of 648851398 is 893158846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12477886 + ... + 12477937.

It is an arithmetic number, because the mean of its divisors is an integer number (131018076).

Almost surely, 2^648851398 is an apocalyptic number.

648851398 is a deficient number, since it is larger than the sum of its proper divisors (399293210).

648851398 is a wasteful number, since it uses less digits than its factorization.

648851398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24955838.

The product of its digits is 1658880, while the sum is 52.

The square root of 648851398 is about 25472.5616693728. The cubic root of 648851398 is about 865.7285665690.

The spelling of 648851398 in words is "six hundred forty-eight million, eight hundred fifty-one thousand, three hundred ninety-eight".