6857780 has 12 divisors (see below), whose sum is σ = 14401380. Its totient is φ = 2743104.

The previous prime is 6857779. The next prime is 6857801. The reversal of 6857780 is 877586.

It can be written as a sum of positive squares in 2 ways, for example, as 913936 + 5943844 = 956^2 + 2438^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 171425 + ... + 171464.

It is an arithmetic number, because the mean of its divisors is an integer number (1200115).

Almost surely, 2^6857780 is an apocalyptic number.

It is an amenable number.

6857780 is an abundant number, since it is smaller than the sum of its proper divisors (7543600).

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

6857780 is a wasteful number, since it uses less digits than its factorization.

6857780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342898 (or 342896 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 6857780 is about 2618.7363364799. The cubic root of 6857780 is about 189.9887343274.

The spelling of 6857780 in words is "six million, eight hundred fifty-seven thousand, seven hundred eighty".