806290 has 8 divisors (see below), whose sum is σ = 1451340. Its totient is φ = 322512.

The previous prime is 806269. The next prime is 806291. The reversal of 806290 is 92608.

It can be written as a sum of positive squares in 2 ways, for example, as 804609 + 1681 = 897^2 + 41^2 .

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

It is not an unprimeable number, because it can be changed into a prime (806291) by changing a digit.

806290 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40305 + ... + 40324.

2⁸⁰⁶²⁹⁰ is an apocalyptic number.

806290 is a deficient number, since it is larger than the sum of its proper divisors (645050).

806290 is a wasteful number, since it uses less digits than its factorization.

806290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80636.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 806290 is about 897.9365233690. The cubic root of 806290 is about 93.0744384178.

Adding to 806290 its reverse (92608), we get a palindrome (898898).

The spelling of 806290 in words is "eight hundred six thousand, two hundred ninety".