6842780 has 48 divisors (see below), whose sum is σ = 16879296. Its totient is φ = 2280960.

The previous prime is 6842779. The next prime is 6842783. The reversal of 6842780 is 872486.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6842780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6842783) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4520 + ... + 5840.

It is an arithmetic number, because the mean of its divisors is an integer number (351652).

Almost surely, 2^6842780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6842780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8439648).

6842780 is an abundant number, since it is smaller than the sum of its proper divisors (10036516).

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

6842780 is a wasteful number, since it uses less digits than its factorization.

6842780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 6842780 is about 2615.8707919161. The cubic root of 6842780 is about 189.8501126281.

The spelling of 6842780 in words is "six million, eight hundred forty-two thousand, seven hundred eighty".