820276 has 6 divisors (see below), whose sum is σ = 1435490. Its totient is φ = 410136.

The previous prime is 820273. The next prime is 820279. The reversal of 820276 is 672028.

It is an interprime number because it is at equal distance from previous prime (820273) and next prime (820279).

It can be written as a sum of positive squares in only one way, i.e., 767376 + 52900 = 876^2 + 230^2 .

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 820276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820271) 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 as a sum of consecutive naturals, namely, 102531 + ... + 102538.

2⁸²⁰²⁷⁶ is an apocalyptic number.

It is an amenable number.

820276 is a deficient number, since it is larger than the sum of its proper divisors (615214).

820276 is a wasteful number, since it uses less digits than its factorization.

820276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205073 (or 205071 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 820276 is about 905.6908964984. The cubic root of 820276 is about 93.6095164065.

The spelling of 820276 in words is "eight hundred twenty thousand, two hundred seventy-six".