6428785 has 16 divisors (see below), whose sum is σ = 8475840. Its totient is φ = 4642240.

The previous prime is 6428777. The next prime is 6428789. The reversal of 6428785 is 5878246.

It is not a de Polignac number, because 6428785 - 2³ = 6428777 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6428789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9519 + ... + 10171.

It is an arithmetic number, because the mean of its divisors is an integer number (529740).

Almost surely, 2^6428785 is an apocalyptic number.

It is an amenable number.

6428785 is a deficient number, since it is larger than the sum of its proper divisors (2047055).

6428785 is a wasteful number, since it uses less digits than its factorization.

6428785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its digits is 107520, while the sum is 40.

The square root of 6428785 is about 2535.5048806894. The cubic root of 6428785 is about 185.9414873565.

It can be divided in two parts, 64 and 28785, that multiplied together give a triangular number (1842240 = T₁₉₁₉).

The spelling of 6428785 in words is "six million, four hundred twenty-eight thousand, seven hundred eighty-five".