206680440 has 64 divisors (see below), whose sum is σ = 620991360. Its totient is φ = 55030400.

The previous prime is 206680429. The next prime is 206680471. The reversal of 206680440 is 44086602.

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

It is a junction number, because it is equal to n+sod(n) for n = 206680398 and 206680407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141715 + ... + 143165.

It is an arithmetic number, because the mean of its divisors is an integer number (9702990).

Almost surely, 2^206680440 is an apocalyptic number.

206680440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206680440 is an abundant number, since it is smaller than the sum of its proper divisors (414310920).

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

206680440 is a wasteful number, since it uses less digits than its factorization.

206680440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652 (or 2648 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 206680440 is about 14376.3848028633. The cubic root of 206680440 is about 591.2436087910.

The spelling of 206680440 in words is "two hundred six million, six hundred eighty thousand, four hundred forty".