6809890 has 8 divisors (see below), whose sum is σ = 12257820. Its totient is φ = 2723952.

The previous prime is 6809851. The next prime is 6809893. The reversal of 6809890 is 989086.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5870929 + 938961 = 2423^2 + 969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (6809893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340485 + ... + 340504.

Almost surely, 2^6809890 is an apocalyptic number.

6809890 is a deficient number, since it is larger than the sum of its proper divisors (5447930).

6809890 is a wasteful number, since it uses less digits than its factorization.

6809890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680996.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 6809890 is about 2609.5765940091. The cubic root of 6809890 is about 189.5454508162.

The spelling of 6809890 in words is "six million, eight hundred nine thousand, eight hundred ninety".