206980440 has 128 divisors (see below), whose sum is σ = 661763520. Its totient is φ = 51609600.

The previous prime is 206980439. The next prime is 206980451. The reversal of 206980440 is 44089602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 491430 + ... + 491850.

Almost surely, 2^206980440 is an apocalyptic number.

206980440 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 206980440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330881760).

206980440 is an abundant number, since it is smaller than the sum of its proper divisors (454783080).

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

206980440 is a wasteful number, since it uses less digits than its factorization.

206980440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 206980440 is about 14386.8147968895. The cubic root of 206980440 is about 591.5295370447.

The spelling of 206980440 in words is "two hundred six million, nine hundred eighty thousand, four hundred forty".