208478 has 4 divisors (see below), whose sum is σ = 312720. Its totient is φ = 104238.

The previous prime is 208469. The next prime is 208489. The reversal of 208478 is 874802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874802 = 2 ⋅437401.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 208478.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 208478.

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 as a sum of consecutive naturals, namely, 52118 + ... + 52121.

It is an arithmetic number, because the mean of its divisors is an integer number (78180).

2²⁰⁸⁴⁷⁸ is an apocalyptic number.

208478 is a deficient number, since it is larger than the sum of its proper divisors (104242).

208478 is a wasteful number, since it uses less digits than its factorization.

208478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104241.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 208478 is about 456.5939114793. The cubic root of 208478 is about 59.2952736039.

It can be divided in two parts, 208 and 478, that added together give a palindrome (686).

The spelling of 208478 in words is "two hundred eight thousand, four hundred seventy-eight".