206930280 has 128 divisors (see below), whose sum is σ = 642660480. Its totient is φ = 53268480.

The previous prime is 206930279. The next prime is 206930291. The reversal of 206930280 is 82039602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 673887 + ... + 674193.

It is an arithmetic number, because the mean of its divisors is an integer number (5020785).

Almost surely, 2^206930280 is an apocalyptic number.

206930280 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 206930280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321330240).

206930280 is an abundant number, since it is smaller than the sum of its proper divisors (435730200).

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

206930280 is a wasteful number, since it uses less digits than its factorization.

206930280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 206930280 is about 14385.0714283941. The cubic root of 206930280 is about 591.4817490850.

Adding to 206930280 its reverse (82039602), we get a palindrome (288969882).

The spelling of 206930280 in words is "two hundred six million, nine hundred thirty thousand, two hundred eighty".