6879780 has 72 divisors (see below), whose sum is σ = 21453432. Its totient is φ = 1783296.

The previous prime is 6879683. The next prime is 6879797. The reversal of 6879780 is 879786.

It can be written as a sum of positive squares in 4 ways, for example, as 3873024 + 3006756 = 1968^2 + 1734^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6144 + ... + 7176.

Almost surely, 2^6879780 is an apocalyptic number.

6879780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6879780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10726716).

6879780 is an abundant number, since it is smaller than the sum of its proper divisors (14573652).

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

6879780 is a wasteful number, since it uses less digits than its factorization.

6879780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 6879780 is about 2622.9334722787. The cubic root of 6879780 is about 190.1916809810.

The spelling of 6879780 in words is "six million, eight hundred seventy-nine thousand, seven hundred eighty".