6478805 has 4 divisors (see below), whose sum is σ = 7774572. Its totient is φ = 5183040.

The previous prime is 6478793. The next prime is 6478831. The reversal of 6478805 is 5088746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2845969 + 3632836 = 1687^2 + 1906^2 .

It is not a de Polignac number, because 6478805 - 2¹⁰ = 6477781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 647876 + ... + 647885.

It is an arithmetic number, because the mean of its divisors is an integer number (1943643).

Almost surely, 2^6478805 is an apocalyptic number.

It is an amenable number.

6478805 is a deficient number, since it is larger than the sum of its proper divisors (1295767).

6478805 is a wasteful number, since it uses less digits than its factorization.

6478805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295766.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 6478805 is about 2545.3496812815. The cubic root of 6478805 is about 186.4224893353.

The spelling of 6478805 in words is "six million, four hundred seventy-eight thousand, eight hundred five".