6809490 has 48 divisors (see below), whose sum is σ = 18322200. Its totient is φ = 1752576.

The previous prime is 6809483. The next prime is 6809507. The reversal of 6809490 is 949086.

It can be written as a sum of positive squares in 4 ways, for example, as 5461569 + 1347921 = 2337^2 + 1161^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1306 + ... + 3914.

Almost surely, 2^6809490 is an apocalyptic number.

It is a pronic number, being equal to 2609×2610.

It is a practical number, because each smaller number is the sum of distinct divisors of 6809490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9161100).

6809490 is an abundant number, since it is smaller than the sum of its proper divisors (11512710).

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

6809490 is a wasteful number, since it uses less digits than its factorization.

6809490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651 (or 2648 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 6809490 is about 2609.4999520981. The cubic root of 6809490 is about 189.5417395636.

The spelling of 6809490 in words is "six million, eight hundred nine thousand, four hundred ninety".