200840 has 16 divisors (see below), whose sum is σ = 451980. Its totient is φ = 80320.

The previous prime is 200807. The next prime is 200843. The reversal of 200840 is 48002.

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 5476 = 442^2 + 74^2 .

It is not an unprimeable number, because it can be changed into a prime (200843) by changing a digit.

200840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2471 + ... + 2550.

2²⁰⁰⁸⁴⁰ is an apocalyptic number.

200840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200840 is an abundant number, since it is smaller than the sum of its proper divisors (251140).

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

200840 is a wasteful number, since it uses less digits than its factorization.

200840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032 (or 5028 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 200840 is about 448.1517600099. The cubic root of 200840 is about 58.5621129061.

Adding to 200840 its reverse (48002), we get a palindrome (248842).

It can be divided in two parts, 2008 and 40, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 200840 in words is "two hundred thousand, eight hundred forty".