366820 has 12 divisors (see below), whose sum is σ = 770364. Its totient is φ = 146720.

The previous prime is 366811. The next prime is 366829. The reversal of 366820 is 28663.

It is an interprime number because it is at equal distance from previous prime (366811) and next prime (366829).

It can be written as a sum of positive squares in 2 ways, for example, as 79524 + 287296 = 282^2 + 536^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366829) by changing a digit.

366820 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9151 + ... + 9190.

It is an arithmetic number, because the mean of its divisors is an integer number (64197).

2³⁶⁶⁸²⁰ is an apocalyptic number.

It is an amenable number.

366820 is an abundant number, since it is smaller than the sum of its proper divisors (403544).

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

366820 is a wasteful number, since it uses less digits than its factorization.

366820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18350 (or 18348 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 366820 is about 605.6566684187. The cubic root of 366820 is about 71.5842812680.

The spelling of 366820 in words is "three hundred sixty-six thousand, eight hundred twenty".