208021078 has 32 divisors (see below), whose sum is σ = 338722560. Its totient is φ = 95447040.

The previous prime is 208021043. The next prime is 208021087. The reversal of 208021078 is 870120802.

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 15 ways as a sum of consecutive naturals, for example, 434043 + ... + 434521.

It is an arithmetic number, because the mean of its divisors is an integer number (10585080).

Almost surely, 2^208021078 is an apocalyptic number.

208021078 is a deficient number, since it is larger than the sum of its proper divisors (130701482).

208021078 is a wasteful number, since it uses less digits than its factorization.

208021078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 208021078 is about 14422.9358315150. The cubic root of 208021078 is about 592.5192269452.

The spelling of 208021078 in words is "two hundred eight million, twenty-one thousand, seventy-eight".