820236 has 24 divisors (see below), whose sum is σ = 1980720. Its totient is φ = 263872.

The previous prime is 820231. The next prime is 820241. The reversal of 820236 is 632028.

It is an interprime number because it is at equal distance from previous prime (820231) and next prime (820241).

It is not an unprimeable number, because it can be changed into a prime (820231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (82530).

2⁸²⁰²³⁶ is an apocalyptic number.

It is an amenable number.

820236 is an abundant number, since it is smaller than the sum of its proper divisors (1160484).

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

820236 is a wasteful number, since it uses less digits than its factorization.

820236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393 (or 2391 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 820236 is about 905.6688136400. The cubic root of 820236 is about 93.6079947879.

The spelling of 820236 in words is "eight hundred twenty thousand, two hundred thirty-six".