206242040 has 16 divisors (see below), whose sum is σ = 464044680. Its totient is φ = 82496800.

The previous prime is 206242021. The next prime is 206242051. The reversal of 206242040 is 40242602.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2577986 + ... + 2578065.

Almost surely, 2^206242040 is an apocalyptic number.

206242040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206242040 is an abundant number, since it is smaller than the sum of its proper divisors (257802640).

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

206242040 is a wasteful number, since it uses less digits than its factorization.

206242040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156062 (or 5156058 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 206242040 is about 14361.1294820428. The cubic root of 206242040 is about 590.8252742799.

Adding to 206242040 its reverse (40242602), we get a palindrome (246484642).

The spelling of 206242040 in words is "two hundred six million, two hundred forty-two thousand, forty".