800648639 has 8 divisors (see below), whose sum is σ = 917114880. Its totient is φ = 684704376.

The previous prime is 800648557. The next prime is 800648707. The reversal of 800648639 is 936846008.

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

It is a cyclic number.

It is not a de Polignac number, because 800648639 - 2⁸ = 800648383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 800648639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800648039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127199 + ... + 133344.

It is an arithmetic number, because the mean of its divisors is an integer number (114639360).

Almost surely, 2^800648639 is an apocalyptic number.

800648639 is a deficient number, since it is larger than the sum of its proper divisors (116466241).

800648639 is a wasteful number, since it uses less digits than its factorization.

800648639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260989.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 800648639 is about 28295.7353500488. The cubic root of 800648639 is about 928.5685919068.

The spelling of 800648639 in words is "eight hundred million, six hundred forty-eight thousand, six hundred thirty-nine".