206840304 has 150 divisors (see below), whose sum is σ = 658525560. Its totient is φ = 62631360.

The previous prime is 206840303. The next prime is 206840321. The reversal of 206840304 is 403048602.

It is a super-2 number, since 2×206840304² = 85565822717624832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206840303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 156157 + ... + 157475.

Almost surely, 2^206840304 is an apocalyptic number.

206840304 is a gapful number since it is divisible by the number (24) 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 206840304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329262780).

206840304 is an abundant number, since it is smaller than the sum of its proper divisors (451685256).

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

206840304 is a wasteful number, since it uses less digits than its factorization.

206840304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 206840304 is about 14381.9436794892. The cubic root of 206840304 is about 591.3960086492.

Adding to 206840304 its reverse (403048602), we get a palindrome (609888906).

The spelling of 206840304 in words is "two hundred six million, eight hundred forty thousand, three hundred four".