206805500 has 96 divisors (see below), whose sum is σ = 518918400. Its totient is φ = 71208000.

The previous prime is 206805491. The next prime is 206805509. The reversal of 206805500 is 5508602.

It is an interprime number because it is at equal distance from previous prime (206805491) and next prime (206805509).

It is a self number, because there is not a number n which added to its sum of digits gives 206805500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206805509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103511 + ... + 105489.

It is an arithmetic number, because the mean of its divisors is an integer number (5405400).

Almost surely, 2^206805500 is an apocalyptic number.

206805500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206805500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259459200).

206805500 is an abundant number, since it is smaller than the sum of its proper divisors (312112900).

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

206805500 is a wasteful number, since it uses less digits than its factorization.

206805500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 206805500 is about 14380.7336391437. The cubic root of 206805500 is about 591.3628363566.

The spelling of 206805500 in words is "two hundred six million, eight hundred five thousand, five hundred".