6478785 has 40 divisors (see below), whose sum is σ = 12310056. Its totient is φ = 3248640.

The previous prime is 6478781. The next prime is 6478793. The reversal of 6478785 is 5878746.

6478785 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1656369 + 4822416 = 1287^2 + 2196^2 .

It is not a de Polignac number, because 6478785 - 2² = 6478781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6478785.

It is not an unprimeable number, because it can be changed into a prime (6478781) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6415 + ... + 7355.

Almost surely, 2^6478785 is an apocalyptic number.

It is an amenable number.

6478785 is a deficient number, since it is larger than the sum of its proper divisors (5831271).

6478785 is a wasteful number, since it uses less digits than its factorization.

6478785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 966 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 6478785 is about 2545.3457525452. The cubic root of 6478785 is about 186.4222975070.

The spelling of 6478785 in words is "six million, four hundred seventy-eight thousand, seven hundred eighty-five".