6857778 has 16 divisors (see below), whose sum is σ = 13754880. Its totient is φ = 2279376.

The previous prime is 6857777. The next prime is 6857779. The reversal of 6857778 is 8777586.

It is an interprime number because it is at equal distance from previous prime (6857777) and next prime (6857779).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6857777) 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, 943 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (859680).

Almost surely, 2^6857778 is an apocalyptic number.

6857778 is an abundant number, since it is smaller than the sum of its proper divisors (6897102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6857778 is a wasteful number, since it uses less digits than its factorization.

6857778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3281.

The product of its digits is 658560, while the sum is 48.

The square root of 6857778 is about 2618.7359546163. The cubic root of 6857778 is about 189.9887158580.

The spelling of 6857778 in words is "six million, eight hundred fifty-seven thousand, seven hundred seventy-eight".