823490 has 8 divisors (see below), whose sum is σ = 1482300. Its totient is φ = 329392.

The previous prime is 823489. The next prime is 823499. The reversal of 823490 is 94328.

It can be written as a sum of positive squares in 2 ways, for example, as 822649 + 841 = 907^2 + 29^2 .

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 (823499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41165 + ... + 41184.

2⁸²³⁴⁹⁰ is an apocalyptic number.

823490 is a deficient number, since it is larger than the sum of its proper divisors (658810).

823490 is a wasteful number, since it uses less digits than its factorization.

823490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82356.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 823490 is about 907.4634978885. The cubic root of 823490 is about 93.7316171364.

The spelling of 823490 in words is "eight hundred twenty-three thousand, four hundred ninety".