6871780 has 12 divisors (see below), whose sum is σ = 14430780. Its totient is φ = 2748704.

The previous prime is 6871769. The next prime is 6871793. The reversal of 6871780 is 871786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 996004 + 5875776 = 998^2 + 2424^2 .

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, 171775 + ... + 171814.

It is an arithmetic number, because the mean of its divisors is an integer number (1202565).

Almost surely, 2^6871780 is an apocalyptic number.

It is an amenable number.

6871780 is an abundant number, since it is smaller than the sum of its proper divisors (7559000).

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

6871780 is a wasteful number, since it uses less digits than its factorization.

6871780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343598 (or 343596 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 6871780 is about 2621.4080186037. The cubic root of 6871780 is about 190.1179323248.

The spelling of 6871780 in words is "six million, eight hundred seventy-one thousand, seven hundred eighty".