208425478 has 16 divisors (see below), whose sum is σ = 329472000. Its totient is φ = 98614152.

The previous prime is 208425473. The next prime is 208425527. The reversal of 208425478 is 874524802.

It is a self number, because there is not a number n which added to its sum of digits gives 208425478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208425473) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 36843 + ... + 42121.

It is an arithmetic number, because the mean of its divisors is an integer number (20592000).

Almost surely, 2^208425478 is an apocalyptic number.

208425478 is a deficient number, since it is larger than the sum of its proper divisors (121046522).

208425478 is a wasteful number, since it uses less digits than its factorization.

208425478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6339.

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 208425478 is about 14436.9483617557. The cubic root of 208425478 is about 592.9029375322.

The spelling of 208425478 in words is "two hundred eight million, four hundred twenty-five thousand, four hundred seventy-eight".