820460 has 12 divisors (see below), whose sum is σ = 1723008. Its totient is φ = 328176.

The previous prime is 820459. The next prime is 820481. The reversal of 820460 is 64028.

It is a super-2 number, since 2×820460² = 1346309223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 41023 = 820460 / (8 + 2 + 0 + 4 + 6 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20492 + ... + 20531.

It is an arithmetic number, because the mean of its divisors is an integer number (143584).

2⁸²⁰⁴⁶⁰ is an apocalyptic number.

It is an amenable number.

820460 is an abundant number, since it is smaller than the sum of its proper divisors (902548).

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

820460 is a wasteful number, since it uses less digits than its factorization.

820460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41032 (or 41030 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 820460 is about 905.7924707128. The cubic root of 820460 is about 93.6165152147.

Adding to 820460 its reverse (64028), we get a palindrome (884488).

The spelling of 820460 in words is "eight hundred twenty thousand, four hundred sixty".