206249738 has 8 divisors (see below), whose sum is σ = 309437760. Its totient is φ = 103103820.

The previous prime is 206249737. The next prime is 206249749. The reversal of 206249738 is 837942602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 206249695 and 206249704.

It is not an unprimeable number, because it can be changed into a prime (206249737) 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 3 ways as a sum of consecutive naturals, for example, 8873 + ... + 22163.

It is an arithmetic number, because the mean of its divisors is an integer number (38679720).

Almost surely, 2^206249738 is an apocalyptic number.

206249738 is a deficient number, since it is larger than the sum of its proper divisors (103188022).

206249738 is a wasteful number, since it uses less digits than its factorization.

206249738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21052.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 206249738 is about 14361.3974946730. The cubic root of 206249738 is about 590.8326250547.

The spelling of 206249738 in words is "two hundred six million, two hundred forty-nine thousand, seven hundred thirty-eight".