206244540 has 36 divisors (see below), whose sum is σ = 625608984. Its totient is φ = 54998496.

The previous prime is 206244523. The next prime is 206244551. The reversal of 206244540 is 45442602.

206244540 is a `hidden beast` number, since 20 + 62 + 44 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 572722 + ... + 573081.

Almost surely, 2^206244540 is an apocalyptic number.

206244540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206244540 is an abundant number, since it is smaller than the sum of its proper divisors (419364444).

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

206244540 is a wasteful number, since it uses less digits than its factorization.

206244540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145818 (or 1145813 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 206244540 is about 14361.2165222867. The cubic root of 206244540 is about 590.8276615352.

The spelling of 206244540 in words is "two hundred six million, two hundred forty-four thousand, five hundred forty".