206508940 has 24 divisors (see below), whose sum is σ = 473093712. Its totient is φ = 75094080.

The previous prime is 206508931. The next prime is 206508947. The reversal of 206508940 is 49805602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 206508896 and 206508905.

It is not an unprimeable number, because it can be changed into a prime (206508947) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 469119 + ... + 469558.

It is an arithmetic number, because the mean of its divisors is an integer number (19712238).

Almost surely, 2^206508940 is an apocalyptic number.

206508940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206508940 is an abundant number, since it is smaller than the sum of its proper divisors (266584772).

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

206508940 is a wasteful number, since it uses less digits than its factorization.

206508940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938697 (or 938695 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 206508940 is about 14370.4189222166. The cubic root of 206508940 is about 591.0800288250.

The spelling of 206508940 in words is "two hundred six million, five hundred eight thousand, nine hundred forty".