820026 has 12 divisors (see below), whose sum is σ = 1776762. Its totient is φ = 273336.

The previous prime is 819991. The next prime is 820037. The reversal of 820026 is 620028.

It can be written as a sum of positive squares in only one way, i.e., 720801 + 99225 = 849^2 + 315^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 45557 = 820026 / (8 + 2 + 0 + 0 + 2 + 6).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 819990 and 820008.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22761 + ... + 22796.

2⁸²⁰⁰²⁶ is an apocalyptic number.

820026 is an abundant number, since it is smaller than the sum of its proper divisors (956736).

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

820026 is a wasteful number, since it uses less digits than its factorization.

820026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45565 (or 45562 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 820026 is about 905.5528697983. The cubic root of 820026 is about 93.6000054789.

The spelling of 820026 in words is "eight hundred twenty thousand, twenty-six".