208981742 has 8 divisors (see below), whose sum is σ = 313572432. Its totient is φ = 104457600.

The previous prime is 208981709. The next prime is 208981771. The reversal of 208981742 is 247189802.

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

It is a self number, because there is not a number n which added to its sum of digits gives 208981742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7859 + ... + 21902.

It is an arithmetic number, because the mean of its divisors is an integer number (39196554).

Almost surely, 2^208981742 is an apocalyptic number.

208981742 is a deficient number, since it is larger than the sum of its proper divisors (104590690).

208981742 is a wasteful number, since it uses less digits than its factorization.

208981742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33274.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 208981742 is about 14456.2008148753. The cubic root of 208981742 is about 593.4299325810.

The spelling of 208981742 in words is "two hundred eight million, nine hundred eighty-one thousand, seven hundred forty-two".