206809480 has 16 divisors (see below), whose sum is σ = 465321420. Its totient is φ = 82723776.

The previous prime is 206809451. The next prime is 206809481. The reversal of 206809480 is 84908602.

It can be written as a sum of positive squares in 2 ways, for example, as 185667876 + 21141604 = 13626^2 + 4598^2 .

It is a super-2 number, since 2×206809480² = 85540322035740800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206809481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2585079 + ... + 2585158.

Almost surely, 2^206809480 is an apocalyptic number.

206809480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206809480 is an abundant number, since it is smaller than the sum of its proper divisors (258511940).

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

206809480 is a wasteful number, since it uses less digits than its factorization.

206809480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170248 (or 5170244 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 206809480 is about 14380.8720180662. The cubic root of 206809480 is about 591.3666299517.

The spelling of 206809480 in words is "two hundred six million, eight hundred nine thousand, four hundred eighty".