810490 has 8 divisors (see below), whose sum is σ = 1458900. Its totient is φ = 324192.

The previous prime is 810487. The next prime is 810493. The reversal of 810490 is 94018.

It is an interprime number because it is at equal distance from previous prime (810487) and next prime (810493).

It can be written as a sum of positive squares in 2 ways, for example, as 741321 + 69169 = 861^2 + 263^2 .

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 (810493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40515 + ... + 40534.

2⁸¹⁰⁴⁹⁰ is an apocalyptic number.

810490 is a deficient number, since it is larger than the sum of its proper divisors (648410).

810490 is a wasteful number, since it uses less digits than its factorization.

810490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81056.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 810490 is about 900.2721810653. The cubic root of 810490 is about 93.2357682282.

It can be divided in two parts, 810 and 490, that multiplied together give a square (396900 = 630²).

The spelling of 810490 in words is "eight hundred ten thousand, four hundred ninety".