208042738 has 4 divisors (see below), whose sum is σ = 312064110. Its totient is φ = 104021368.

The previous prime is 208042711. The next prime is 208042763. The reversal of 208042738 is 837240802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 207273609 + 769129 = 14397^2 + 877^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52010683 + ... + 52010686.

Almost surely, 2^208042738 is an apocalyptic number.

208042738 is a deficient number, since it is larger than the sum of its proper divisors (104021372).

208042738 is a wasteful number, since it uses less digits than its factorization.

208042738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104021371.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 208042738 is about 14423.6866993151. The cubic root of 208042738 is about 592.5397914014.

The spelling of 208042738 in words is "two hundred eight million, forty-two thousand, seven hundred thirty-eight".