6704820 has 54 divisors (see below), whose sum is σ = 20443878. Its totient is φ = 1778688.

The previous prime is 6704813. The next prime is 6704821. The reversal of 6704820 is 284076.

It can be written as a sum of positive squares in 3 ways, for example, as 17424 + 6687396 = 132^2 + 2586^2 .

It is a super-2 number, since 2×6704820² = 89909222464800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6704821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34644 + ... + 34836.

Almost surely, 2^6704820 is an apocalyptic number.

6704820 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 6704820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10221939).

6704820 is an abundant number, since it is smaller than the sum of its proper divisors (13739058).

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

6704820 is a wasteful number, since it uses less digits than its factorization.

6704820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 6704820 is about 2589.3667179448. The cubic root of 6704820 is about 188.5655596363.

Adding to 6704820 its reverse (284076), we get a palindrome (6988896).

The spelling of 6704820 in words is "six million, seven hundred four thousand, eight hundred twenty".